Set a console password to cisco
Router(config)#line con 0
Router(config-line)#login
Router(config-line)#password cisco
Router(config-line)#login
Router(config-line)#password cisco
Set a telnet password
Router(config)#line vty 0 4
Router(config-line)#login
Router(config-line)#password cisco
Router(config-line)#login
Router(config-line)#password cisco
Stop console timing out
Router(config)#line con 0
Router(config-line)#exec-timeout 0 0
Router(config-line)#exec-timeout 0 0
Set the enable password to cisco
Router(config)#enable password cisco
Set the enable secret password to peter
Router(config)#enable secret peter
This password overrides the enable password
and is encrypted within the config file.
Enable an interface
Router(config-if)#no shutdown
To disable an interface
Router(config-if)#shutdown
Set the clock rate for a router with a DCE
cable to 64K
Router(config-if)clock rate 64000
Set a logical bandwidth assignment of 64K
to the serial interface
Router(config-if)bandwidth 64
Note that the zeroes are not missing
Note that the zeroes are not missing
To add an IP address to a interface
Router(config-if)#ip addr 10.1.1.1 255.255.255.0
To enable RIP on all 172.16.x.y interfaces
Router(config)#router rip
Router(config-router)#network 172.16.0.0
Router(config-router)#network 172.16.0.0
Disable RIP
Router(config)#no router rip
To enable IRGP with a AS of 200, to all
interfaces
Router(config)#router igrp 200
Router(config-router)#network 172.16.0.0
Router(config-router)#network 172.16.0.0
Disable IGRP
Router(config)#no router igrp 200
Static route the remote network is
172.16.1.0, with a mask of 255.255.255.0, the next hop is 172.16.2.1, at a cost
of 5 hops
Router(config)#ip route 172.16.1.0 255.255.255.0 172.16.2.1 5
Disable CDP for the whole router
Router(config)#no cdp run
Enable CDP for the whole router
Router(config)#cdp run
Disable CDP on an interface
Router(config-if)#no cdp enable
View version information
show version
View current configuration (DRAM)
show running-config
View startup configuration (NVRAM)
show startup-config
Show IOS file and flash space
show flash
Shows all logs that the router has in its
memory
show log
View the interface status of interface e0
show interface e0
Overview all interfaces on the router
show ip interfaces brief
View type of serial cable on s0
show controllers 0 (note the space between
the 's' and the '0')
Display a summary of connected cdp devices
show cdp neighbor
Display detailed information on all devices
show cdp entry *
Display current routing protocols
show ip protocols
Display IP routing table
show ip route
Display access lists, this includes the
number of displayed matches
show access-lists
Check the router can see the ISDN switch
show isdn status
Check a Frame Relay PVC connections
show frame-relay pvc
show lmi traffic stats
show frame-relay lmi
Display the frame inverse ARP table
show frame-relay map
Cisco
Router Debug Commands
Enable debug for RIP
debug ip rip
Enable summary IGRP debug information
debug ip igrp events
Enable detailed IGRP debug information
debug ip igrp transactions
Debug IPX RIP
debug ipx routing activity
Debug IPX SAP
debug IPX SAP
Enable debug for CHAP or PAP
debug ppp authentication
Switch all debugging off
no debug all
undebug all
undebug all
IP
Addressing Commands
This
chapter describes the function and displays the syntax for IP addressing
commands. For more information about defaults and usage guidelines, see the
corresponding chapter of the Network
Protocols Command Reference, Part 1.
arp
(global)
To add a
permanent entry in the Address Resolution Protocol (ARP) cache, use the arp
global configuration command. To remove an entry from the ARP cache, use the no
form of this command.arp ip-address hardware-address type [alias]
no arp ip-address hardware-address type [alias]
ip-address
|
IP
address in four-part dotted-decimal format corresponding to the local data
link address.
|
hardware-address
|
Local
data link address (a 48-bit address).
|
type
|
Encapsulation
description. For Ethernet interfaces, this is typically the arpa
keyword. For Fiber Distributed Data Interface (FDDI) and Token Ring
interfaces, this is always snap.
|
alias
|
(Optional)
Indicates that the Cisco IOS software should respond to ARP requests as if it
were the owner of the specified address.
|
arp (interface)
To control
the interface-specific handling of IP address resolution into 48-bit Ethernet,
FDDI, and Token Ring hardware addresses, use the arp interface
configuration command. To disable an encapsulation type, use the no form
of this command.arp {arpa | probe | snap}
no arp {arpa | probe | snap}
arpa
|
Standard
Ethernet-style ARP (RFC 826).
|
probe
|
HP
Probe protocol for IEEE-802.3 networks.
|
snap
|
ARP
packets conforming to RFC 1042.
|
arp timeout
To configure
how long an entry remains in the ARP cache, use the arp timeout interface
configuration command. To restore the default value, use the no form of
this command.arp timeout seconds
no arp timeout seconds
seconds
|
Time
(in seconds) that an entry remains in the ARP cache. A value of
zero means that entries are never cleared from the cache.
|
clear arp-cache
To delete
all dynamic entries from the ARP cache, to clear the fast-switching cache, and
to clear the IP route cache, use the clear arp-cache EXEC command.clear arp-cache
clear
host
To delete
entries from the host-name-and-address cache, use the clear host EXEC
command.clear host {name | *}
name
|
Particular
host entry to remove.
|
*
|
Removes
all entries.
|
clear ip nat
translation
To clear
dynamic Network Address Translation (NAT) translations from the translation
table, use the clear ip nat translation EXEC command.clear ip nat translation {* | [inside global-ip local-ip] [outside local-ip global-ip]}
clear ip nat translation protocol inside global-ip global-port local-ip local-port [outside
local-ip global-ip]
*
|
Clears
all dynamic translations.
|
inside
|
Clears
the inside translations containing the specified global-ip and local-ip
addresses.
|
global-ip
|
When
used without the arguments protocol, global-port, and local-port,
clears a simple translation that also contains the specified local-ip
address. When used with the arguments protocol, global-port,
and local-port, clears an extended translation.
|
local-ip
|
(Optional)
Clears an entry that contains this local IP address and the specified global-ip
address.
|
outside
|
Clears
the outside translations containing the specified global-ip and local-ip
addresses.
|
protocol
|
(Optional)
Clears an entry that contains this protocol and the specified global-ip
address, local-ip address, global-port, and local-port.
|
global-port
|
(Optional)
Clears an entry that contains this global-port and the specified protocol,
global-ip address, local-ip address, and local-port.
|
local-port
|
(Optional)
Clears an entry that contains this local-port and the specified protocol,
global-ip address, local-ip address, and global-port.
|
clear ip nhrp
To clear
all dynamic entries from the Next Hop Resolution Protocol (NHRP) cache, use the
clear ip nhrp EXEC command. clear ip nhrp
clear
ip route
To delete
routes from the IP routing table, use the clear ip route EXEC command.clear ip route {network [mask] | *}
network
|
Network
or subnet address to remove.
|
mask
|
(Optional)
Subnet address to remove.
|
*
|
Removes
all routing table entries.
|
ip address
To set a
primary or secondary IP address for an interface, use the ip address
interface configuration command. To remove an IP address or disable IP
processing, use the no form of this command.ip address ip-address mask [secondary]
no ip address ip-address mask [secondary]
ip-address
|
IP
address.
|
mask
|
Mask
for the associated IP subnet.
|
secondary
|
(Optional)
Specifies that the configured address is a secondary IP address.
If this keyword is omitted, the configured address is the primary IP address.
|
ip
broadcast-address
To define
a broadcast address for an interface, use the ip broadcast-address
interface configuration command. To restore the default IP broadcast address,
use the no form of this command.ip broadcast-address [ip-address]
no ip broadcast-address [ip-address]
ip-address
|
(Optional)
IP broadcast address for a network.
|
ip classless
At times
the router might receive packets destined for a subnet of a network that has no
network default route. To have the Cisco IOS software forward such packets to
the best supernet route possible, use the ip classless global
configuration command. To disable this feature, use the no form of this
command.ip classless
no ip classless
ip
default-gateway
To define
a default gateway (router) when IP routing is disabled, use the ip
default-gateway global configuration command. To disable this function, use
the no form of this command.ip default-gateway ip-address
no ip default-gateway ip-address
ip-address
|
IP
address of the router.
|
ip
directed-broadcast
To enable
the translation of directed broadcast to physical broadcasts, use the ip
directed-broadcast interface configuration command. To disable this
function, use the no form of this command. ip directed-broadcast [access-list-number]
no ip directed-broadcast [access-list-number]
access-list-number
|
(Optional)
Number of the access list. If specified, a broadcast must pass the access
list to be forwarded. If not specified, all broadcasts are forwarded.
|
ip domain-list
To define
a list of default domain names to complete unqualified host names, use the ip
domain-list global configuration command. To delete a name from a list, use
the no form of this command.ip domain-list name
no ip domain-list name
name
|
Domain
name. Do not include the initial period that separates an unqualified name
from the domain name.
|
ip domain-lookup
To enable
the IP Domain Naming System (DNS)-based host name-to-address translation, use
the ip domain-lookup global configuration command. To disable the
DNS, use the no form of this command.ip domain-lookup
no ip domain-lookup
ip
domain-lookup nsap
To allow
DNS queries for Connectionless Network System (CLNS) addresses, use the ip domain-lookup nsap
global configuration command. To disable this feature, use the no
form of this command.ip domain-lookup nsap
no ip domain-lookup nsap
ip
domain-name
To define
a default domain name that the Cisco IOS software uses to complete unqualified
host names (names without a dotted-decimal domain name), use the ip
domain-name global configuration command. To disable use of the DNS, use
the no form of this command.ip domain-name name
no ip domain-name
name
|
Default
domain name used to complete unqualified host names. Do not include the
initial period that separates an unqualified name from the domain name.
|
ip forward-protocol
To specify
which protocols and ports the router forwards when forwarding broadcast
packets, use the ip forward-protocol global configuration command. To
remove a protocol or port, use the no form of this command. ip forward-protocol {udp [port] | nd | sdns}
no ip forward-protocol {udp [port] | nd | sdns}
udp
|
Forward
User Datagram Protocol (UDP) datagrams. See the "Default" section
below for a list of port numbers forwarded by default.
|
port
|
(Optional)
Destination port that controls which UDP services are forwarded.
|
nd
|
Forward
Network Disk (ND) datagrams. This protocol is used by older diskless Sun
workstations.
|
sdns
|
Secure
Data Network Service.
|
ip forward-protocol
any-local-broadcast
To forward
any broadcasts including local subnet broadcasts, use the ip
forward-protocol any-local-broadcast global configuration command. To
disable this type of forwarding, use the no form of this command.ip forward-protocol any-local-broadcast
no ip forward-protocol any-local-broadcast
ip
forward-protocol spanning-tree
To permit
IP broadcasts to be flooded throughout the internetwork in a controlled
fashion, use the ip forward-protocol spanning-tree global
configuration command. To disable the flooding of IP broadcasts, use the no form
of this command.ip forward-protocol spanning-tree
no ip forward-protocol spanning-tree
ip
forward-protocol turbo-flood
To speed
up flooding of User Datagram Protocol (UDP) datagrams using the spanning-tree
algorithm, use the ip forward-protocol turbo-flood global configuration
command. To disable this feature, use the no form of this command.ip forward-protocol turbo-flood
no ip forward-protocol turbo-flood
ip
helper-address
To have
the Cisco IOS software forward User Datagram Protocol (UDP) broadcasts,
including BOOTP, received on an interface, use the ip helper-address
interface configuration command. To disable the forwarding of broadcast packets
to specific addresses, use the no form of this command.ip helper-address address
no ip helper-address address
address
|
Destination
broadcast or host address to be used when forwarding UDP broadcasts. There
can be more than one helper address per interface.
|
ip host
To define
a static host name-to-address mapping in the host cache, use the ip host global
configuration command. To remove the name-to-address mapping, use the no
form of this command.ip host name [tcp-port-number] address1 [address2...address8]
no ip host name address1
name
|
Name
of the host. The first character can be either a letter or a number. If you
use a number, the operations you can perform are limited.
|
tcp-port-number
|
(Optional)
TCP port number to connect to when using the defined host name in conjunction
with an EXEC connect or Telnet command. The default is Telnet (port 23).
|
address1
|
Associated
IP address.
|
address2...address8
|
(Optional)
Additional associated IP address. You can bind up to eight addresses to a
host name.
|
ip hp-host
To enter
into the host table the host name of an HP host to be used for HP Probe Proxy
service, use the ip hp-host global configuration command. To remove a
host name, use the no form of this command.ip hp-host hostname ip-address
no ip hp-host hostname ip-address
hostname
|
Name
of the host.
|
ip-address
|
IP
address of the host.
|
ip irdp
To enable
ICMP Router Discovery Protocol (IRDP) processing on an interface, use the ip
irdp interface configuration command. To disable IRDP routing, use
the no form of this command.ip irdp [multicast | holdtime seconds | maxadvertinterval seconds | minadvertinterval
seconds | preference number | address address [number]]
no ip irdp
multicast
|
(Optional)
Use the multicast address (224.0.0.1) instead of IP broadcasts.
|
holdtime seconds
|
(Optional)
Length of time in seconds advertisements are held valid. Default is three
times the maxadvertinterval value. Must be greater than maxadvertinterval
and cannot be greater than 9000 seconds.
|
maxadvertinterval seconds
|
(Optional)
Maximum interval in seconds between advertisements. The default is 600
seconds.
|
minadvertinterval seconds
|
(Optional)
Minimum interval in seconds between advertisements. The default is 0.75 times
the maxadvertinterval. If you change the maxadvertinterval
value, this value defaults to three-quarters of the new value.
|
preference number
|
(Optional)
Preference value. The allowed range is -231 to 231. The
default is 0. A higher value increases the router's preference level. You can
modify a particular router so that it will be the preferred router to which
others home.
|
address address [number]
|
(Optional)
IP address (address) to proxy-advertise, and optionally, its
preference value (number).
|
ip
mobile arp
To enable
local-area mobility, use the ip mobile arp interface configuration
command. To disable local-area mobility, use the no form of this
command. ip mobile arp [timers keepalive hold-time] [access-group access-list-number | name]
no ip mobile arp [timers keepalive hold-time] [access-group access-list-number | name]
timers
|
(Optional)
Indicates that you are setting local-area mobility timers.
|
keepalive
|
(Optional)
Frequency, in seconds, at which the Cisco IOS software sends unicast ARP
messages to a relocated host to verify that the host is present and has not
moved. The default keepalive time is 300 seconds (5 minutes).
|
hold-time
|
(Optional)
Hold time, in seconds. This is the length of time the software considers that
a relocated host is present without receiving some type of ARP broadcast or
unicast from the host. Normally, the hold time should be at least three times
greater than the keepalive time. The default hold time is 900 seconds (15
minutes).
|
access-group
|
(Optional)
Indicates that you are applying an access list. This access list applies only
to local-area mobility.
|
access-list-number
|
(Optional)
Number of a standard IP access list. It is a decimal number from 1 to 99.
Only hosts with addresses permitted by this access list are accepted for
local-area mobility.
|
name
|
(Optional)
Name of an IP access list. The name cannot contain a space or quotation mark,
and must begin with an alphabetic character to avoid ambiguity with numbered
access lists.
|
ip name-server
To specify
the address of one or more name servers to use for name and address resolution,
use the ip name-server global configuration command. To remove the
addresses specified, use the no form of this command.ip name-server server-address1 [[server-address2]...server-address6]
no ip name-server server-address1 [[server-address2]...server-address6]
server-address1
|
IP
addresses of name server.
|
server-address2...server-address6
|
(Optional)
IP addresses of additional name servers (a maximum of six name servers).
|
ip nat
To
designate that traffic originating from or destined for the interface is
subject to Network Address Translation (NAT), use the ip nat interface
configuration command. To prevent the interface from being able to translate,
use the no form of this command. ip nat {inside | outside}
no ip nat {inside | outside}
inside
|
Indicates
the interface is connected to the inside network (the network subject to NAT
translation).
|
outside
|
Indicates
the interface is connected to the outside network.
|
ip nat inside
destination
To enable
Network Address Translation (NAT) of the inside destination address, use the ip
nat inside destination global configuration command. To remove the dynamic
association to a pool, use the no form of this command. ip nat inside destination list {access-list-number | name} pool name
no ip nat inside destination list {access-list-number | name}
list access-list-number
|
Standard
IP access list number. Packets with destination addresses that pass the
access list are translated using global addresses from the named pool.
|
list name
|
Name
of a standard IP access list. Packets with destination addresses that pass
the access list are translated using global addresses from the named pool.
|
pool name
|
Name
of the pool from which global IP addresses are allocated during dynamic translation.
|
ip nat inside
source
To enable
Network Address Translation (NAT) of the inside source address, use the ip
nat inside source global configuration command. To remove the static
translation or remove the dynamic association to a pool, use the no form
of this command. ip nat inside source {list {access-list-number | name} pool name [overload] | static local-ip
global-ip}
no ip nat inside source {list {access-list-number | name} pool name [overload] | static local-ip
global-ip}
list access-list-number
|
Standard
IP access list number. Packets with source addresses that pass the access
list are dynamically translated using global addresses from the named pool.
|
list name
|
Name
of a standard IP access list. Packets with source addresses that pass the
access list are dynamically translated using global addresses from the named
pool.
|
pool name
|
Name
of the pool from which global IP addresses are allocated dynamically.
|
overload
|
(Optional)
Enables the router to use one global address for many local addresses. When
overloading is configured, each inside host's TCP or UDP port number
distinguishes between the multiple conversations using the same local IP
address.
|
static local-ip
|
Sets
up a single static translation; this argument establishes the local IP
address assigned to a host on the inside network. The address could be
randomly chosen, allocated from RFC 1918, or obsolete.
|
global-ip
|
Sets
up a single static translation; this argument establishes the globally unique
IP address of an inside host as it appears to the outside world.
|
ip nat outside
source
To enable
Network Address Translation (NAT) of the outside source address, use the ip
nat outside source global configuration command. To remove the static entry
or the dynamic association, use the no form of this command. ip nat outside source {list {access-list-number | name} pool name | static global-ip local-ip}
no ip nat outside source {list {access-list-number | name} pool name | static global-ip local-ip}
list access-list-number
|
Standard
IP access list number. Packets with source addresses that pass the access
list are translated using global addresses from the named pool.
|
list name
|
Name
of a standard IP access list. Packets with source addresses that pass the
access list are translated using global addresses from the named pool.
|
pool name
|
Name
of the pool from which global IP addresses are allocated.
|
static global-ip
|
Sets
up a single static translation. This argument establishes the globally unique
IP address assigned to a host on the outside network by its owner. It was
allocated from globally routable network space.
|
local-ip
|
Sets
up a single static translation. This argument establishes the local IP
address of an outside host as it appears to the inside world. The address was
allocated from address space routable on the inside (RFC 1918, perhaps).
|
ip nat pool
To define
a pool of IP addresses for Network Address Translation (NAT), use the ip nat
pool global configuration command. To remove one or more addresses from the
pool, use the no form of this command. ip nat pool name start-ip end-ip {netmask netmask | prefix-length prefix-length}
[type rotary]
no ip nat pool name start-ip end-ip {netmask netmask | prefix-length prefix-length}
[type rotary]
name
|
Name
of the pool.
|
start-ip
|
Starting
IP address that defines the range of addresses in the address pool.
|
end-ip
|
Ending
IP address that defines the range of addresses in the address pool.
|
netmask netmask
|
Network
mask that indicates which address bits belong to the network and subnetwork
fields and which bits belong to the host field. Specify the netmask of the
network to which the pool addresses belong.
|
prefix-length prefix-length
|
Number
that indicates how many bits of the netmask are ones (how many bits of the
address indicate network). Specify the netmask of the network to which the
pool addresses belong.
|
type rotary
|
(Optional)
Indicates that the range of address in the address pool identify real, inside
hosts among which TCP load distribution will occur.
|
ip nat translation
To change
the amount of time after which Network Address Translation (NAT) translations
time out, use the ip nat translation global configuration command. To
disable the timeout, use the no form of this command. ip nat translation {timeout | udp-timeout | dns-timeout | tcp-timeout | finrst-timeout}
seconds
no ip nat translation {timeout | udp-timeout | dns-timeout | tcp-timeout | finrst-timeout}
timeout
|
Specifies
that the timeout value applies to dynamic translations except for overload
translations. Default is 86400 seconds (24 hours).
|
udp-timeout
|
Specifies
that the timeout value applies to the UDP port. Default is 300 seconds (5
minutes).
|
dns-timeout
|
Specifies
that the timeout value applies to connections to the Domain Naming System
(DNS). Default is 60 seconds.
|
tcp-timeout
|
Specifies
that the timeout value applies to the TCP port. Default is 86400 seconds (24
hours).
|
finrst-timeout
|
Specifies
that the timeout value applies to Finish and Reset TCP packets, which
terminate a connection. Default is 60 seconds.
|
seconds
|
Number
of seconds after which the specified port translation times out. Default
values are listed in the Default section.
|
ip netmask-format
To specify
the format in which netmasks are displayed in show command output, use
the ip netmask-format line configuration command. To restore the
default display format, use the no form of this command. ip netmask-format {bitcount | decimal | hexadecimal}
no ip netmask-format [bitcount | decimal | hexadecimal]
bitcount
|
Addresses
are followed by a slash and the total number of bits in the netmask. For
example, 131.108.11.0/24 indicates that the netmask is 24 bits.
|
decimal
|
Network
masks are displayed in dotted decimal notation (for example, 255.255.255.0).
|
hexadecimal
|
Network
masks are displayed in hexadecimal format, as indicated by the leading 0X
(for example, 0XFFFFFF00).
|
ip nhrp
authentication
To
configure the authentication string for an interface using Next Hop Resolution
Protocol (NHRP), use the ip nhrp authentication interface configuration
command. To remove the authentication string, use the no form of this
command. ip nhrp authentication string
no ip nhrp authentication [string]
string
|
Authentication
string configured for the source and destination stations that controls
whether NHRP stations allow intercommunication. The string can be up to 8
characters long.
|
ip nhrp holdtime
To change
the number of seconds that NHRP nonbroadcast, multiaccess (NBMA) addresses are
advertised as valid in authoritative NHRP responses, use the ip nhrp
holdtime interface configuration command. To restore the default value, use
the no form of this command. ip nhrp holdtime seconds-positive [seconds-negative]
no ip nhrp holdtime [seconds-positive [seconds-negative]]
seconds-positive
|
Time
in seconds that NBMA addresses are advertised as valid in positive
authoritative NHRP responses.
|
seconds-negative
|
(Optional)
Time in seconds that NBMA addresses are advertised as valid in negative
authoritative NHRP responses.
|
ip nhrp interest
To control
which IP packets can trigger sending a Next Hop Resolution Protocol (NHRP)
Request, use the ip nhrp interest interface configuration command. To
restore the default value, use the no form of this command. ip nhrp interest access-list-number
no ip nhrp interest [access-list-number]
access-list-number
|
Standard
or extended IP access list number in the range 1 to 199.
|
ip nhrp map
To
statically configure the IP-to-NBMA address mapping of IP destinations connected
to a nonbroadcast, multiaccess (NBMA) network, use the ip nhrp map interface
configuration command. To remove the static entry from NHRP cache, use the no
form of this command. ip nhrp map ip-address nbma-address
no ip nhrp map ip-address nbma-address
ip-address
|
IP
address of the destinations reachable through the NBMA network. This address
is mapped to the NBMA address.
|
nbma-address
|
NBMA
address that is directly reachable through the NBMA network. The address
format varies depending on the medium you are using. For example, ATM has an
NSAP address, Ethernet has a MAC address, and SMDS has an E.164 address. This
address is mapped to the IP address.
|
ip nhrp map
multicast
To
configure NBMA addresses used as destinations for broadcast or multicast
packets to be sent over a tunnel network, use the ip nhrp map multicast interface
configuration command. To remove the destinations, use the no form of
this command. ip nhrp map multicast nbma-address
no ip nhrp map multicast nbma-address
nbma-address
|
Nonbroadcast,
multiaccess (NBMA) address which is directly reachable through the NBMA
network. The address format varies depending on the medium you are using.
|
ip nhrp max-send
To change
the maximum frequency at which NHRP packets can be sent, use the ip nhrp
max-send interface configuration command. To restore this frequency to the
default value, use the no form of this command. ip nhrp max-send pkt-count every interval
no ip nhrp max-send
pkt-count
|
Number
of packets which can be transmitted in the range from 1 to 65535. Default is
5 packets.
|
every interval
|
Time
(in seconds) in the range from 10 to 65535. Default is 10 seconds.
|
ip nhrp network-id
To enable
the Next Hop Resolution Protocol (NHRP) on an interface, use the ip nhrp
network-id interface configuration command. To disable NHRP on the
interface, use the no form of this command. ip nhrp network-id number
no ip nhrp network-id [number]
number
|
Globally
unique, 32-bit network identifier for a nonbroadcast, multiaccess (NBMA) network.
The range is 1 to 4294967295.
|
ip nhrp nhs
To specify
the address of one or more NHRP Next Hop Servers, use the ip nhrp nhs interface
configuration command. To remove the address, use the no form of this
command. ip nhrp nhs nhs-address [net-address [netmask]]
no ip nhrp nhs nhs-address [net-address [netmask]]
nhs-address
|
Address
of the Next Hop Server being specified.
|
net-address
|
(Optional)
IP address of a network served by the Next Hop Server.
|
netmask
|
(Optional)
IP network mask to be associated with the net IP address. The net
IP address is logically ANDed with the mask.
|
ip nhrp record
To
re-enable the use of forward record and reverse record options in NHRP Request
and Reply packets, use the ip nhrp record interface configuration command.
To suppress the use of such options, use the no form of this command.ip nhrp record
no ip nhrp record
ip
nhrp responder
To
designate which interface's primary IP address the Next Hop Server will use in
NHRP Reply packets when the NHRP requestor uses the Responder Address option,
use the ip nhrp responder interface configuration command. To remove the
designation, use the no form of this command. ip nhrp responder type number
no ip nhrp responder [type] [number]
type
|
Interface
type whose primary IP address is used when a Next Hop Server complies with a
Responder Address option (for example, serial, tunnel).
|
number
|
Interface
number whose primary IP address is used when a Next Hop Server complies with
a Responder Address option.
|
ip nhrp use
To
configure the software so that NHRP is deferred until the system has attempted
to send data traffic to a particular destination multiple times, use the ip
nhrp use interface configuration command. To restore the default value, use
the no form of this command. ip nhrp use usage-count
no ip nhrp use usage-count
usage-count
|
Packet
count in the range from 1 to 65535. Default is 1.
|
ip probe proxy
To enable
the HP Probe Proxy support, which allows the Cisco IOS software to respond to
HP Probe Proxy Name requests, use the ip probe proxy interface
configuration command. To disable HP Probe Proxy, use the no form of
this command.ip probe proxy
no ip probe proxy
ip
proxy-arp
To enable
proxy ARP on an interface, use the ip proxy-arp interface configuration
command. To disable proxy ARP on the interface, use the no form of this
command.ip proxy-arp
no ip proxy-arp
ip
redirects
To enable
the sending of redirect messages if the Cisco IOS software is forced to resend
a packet through the same interface on which it was received, use the ip
redirects interface configuration command. To disable the sending of
redirect messages, use the no form of this command.ip redirects
no ip redirects
ip
routing
To enable
IP routing, use the ip routing global configuration command. To disable
IP routing, use the no form of this command.ip routing
no ip routing
ip
subnet-zero
To enable
the use of subnet zero for interface addresses and routing updates, use the ip
subnet-zero global configuration command. To restore the default, use the no
form of this command.ip subnet-zero
no ip subnet-zero
ip
unnumbered
To enable
IP processing on a serial interface without assigning an explicit IP address to
the interface, use the ip unnumbered interface configuration command.
To disable the IP processing on the interface, use the no form of
this command.ip unnumbered type number
no ip unnumbered type number
type number
|
Type
and number of another interface on which the router has an assigned IP
address. It cannot be another unnumbered interface.
|
ping (privileged)
To check
host reachability and network connectivity, use the ping (IP packet
internet groper function) privileged EXEC command. ping [protocol] {host | address}
protocol
|
(Optional)
Protocol keyword. The default is IP.
|
host
|
Host
name of system to ping.
|
address
|
IP
address of system to ping.
|
ping (user)
To check
host reachability and network connectivity, use the ping (IP packet
internet groper function) user EXEC command. ping [protocol] {host | address}
protocol
|
(Optional)
Protocol keyword. The default is IP.
|
host
|
Host
name of system to ping.
|
address
|
IP
address of system to ping.
|
show arp
To display
the entries in the ARP table, use the show arp privileged EXEC command.show arp
show
hosts
To display
the default domain name, the style of name lookup service, a list of name
server hosts, and the cached list of host names and addresses, use the show
hosts EXEC command.show hosts
show
ip aliases
To display
the IP addresses mapped to TCP ports (aliases) and SLIP addresses, which are
treated similarly to aliases, use the show ip aliases EXEC command.show ip aliases
show
ip arp
To display
the Address Resolution Protocol (ARP) cache, where SLIP addresses appear as
permanent ARP table entries, use the show ip arp EXEC command. show ip arp [ip-address] [hostname] [mac-address] [type number]
ip-address
|
(Optional)
ARP entries matching this IP address are displayed.
|
hostname
|
(Optional)
Host name.
|
mac-address
|
(Optional)
48-bit MAC address.
|
type number
|
(Optional)
ARP entries learned via this interface type and number are displayed.
|
show ip interface
To display
the usability status of interfaces configured for IP, use the show ip
interface EXEC command.show ip interface [type number]
type
|
(Optional)
Interface type.
|
number
|
(Optional)
Interface number.
|
show ip irdp
To display
IRDP values, use the show ip irdp EXEC command. show ip irdp
show
ip masks
To display
the masks used for network addresses and the number of subnets using each mask,
use the show ip masks EXEC command.show ip masks address
address
|
Network
address for which a mask is required.
|
show ip nat
statistics
To display
Network Address Translation (NAT) statistics, use the show ip nat statistics
EXEC command.show ip nat statistics
show
ip nat translations
To display
active Network Address Translation (NAT) translations, use the show ip nat
translations EXEC command.show ip nat translations [verbose]
verbose
|
(Optional)
Displays additional information for each translation table entry, including
how long ago the entry was created and used.
|
show ip nhrp
To display
the Next Hop Resolution Protocol (NHRP) cache, use the show ip nhrp EXEC
command. show ip nhrp [dynamic | static] [type number]
dynamic
|
(Optional)
Displays only the dynamic (learned) IP-to-NBMA address cache entries.
|
static
|
(Optional)
Displays only the static IP-to-NBMA address entries in the cache (configured
through the ip nhrp map command).
|
type
|
(Optional)
Interface type about which to display the NHRP cache (for example, atm,
tunnel).
|
number
|
(Optional)
Interface number about which to display the NHRP cache.
|
show ip nhrp
traffic
To display
Next Hop Resolution Protocol (NHRP) traffic statistics, use the show ip nhrp
traffic EXEC command. show ip nhrp traffic
show
ip redirects
To display
the address of a default gateway (router) and the address of hosts for which a
redirect has been received, use the show ip redirects EXEC command. show ip redirects
term
ip netmask-format
To specify
the format in which netmasks are displayed in show command output, use
the term ip netmask-format EXEC command. To restore the
default display format, use the no form of this command. term ip netmask-format {bitcount | decimal | hexadecimal}
term no ip netmask-format [bitcount | decimal | hexadecimal]
bitcount
|
Addresses
are followed by a slash and the total number of bits in the netmask. For
example, 131.108.11.55/24 indicates that the netmask is 24 bits.
|
decimal
|
Netmasks
are displayed in dotted decimal notation (for example, 255.255.255.0).
|
hexadecimal
|
Netmasks
are displayed in hexadecimal format, as indicated by the leading 0X (for
example, 0XFFFFFF00).
|
trace (privileged)
To
discover the routes the packets follow when traveling to their destination from
the router, use the trace privileged EXEC command.trace [destination]
destination
|
(Optional)
Destination address or host name on the command line. The default parameters
for the appropriate protocol are assumed and the tracing action begins.
|
trace (user)
To
discover the routes the router packets follow when traveling to their
destination, use the trace user EXEC command.trace ip destination
destination
|
Destination
address or host name on the command line. The default parameters for the
appropriate protocol are assumed and the tracing action begins.
|
tunnel mode
To set the
encapsulation mode for the tunnel interface, use the tunnel mode
interface configuration command. To set to the default, use the no form
of this command.tunnel mode {aurp | cayman | dvmrp | eon | gre ip [multipoint] | nos}
no tunnel mode
AppleTalk
Update-Based Routing Protocol (AURP).
|
|
cayman
|
Cayman
TunnelTalk AppleTalk encapsulation.
|
dvmrp
|
Distance
Vector Multicast Routing Protocol.
|
eon
|
EON
compatible CLNS tunnel.
|
gre ip
|
|
(Optional)
Enables a GRE tunnel to be used in a multipoint fashion. Can be used with the
gre ip keyword only, and requires the use of the tunnel key
command.
|
|
nos
|
KA9Q/NOS
compatible IP over IP.
|
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