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Cisco IOS IP Command Reference, Volume 1 of 4: Addressing and Services, Release 12.3 T
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Introduction
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IP Addressing and Services Commands: A through C
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IP Addressing and Services Commands: D through H
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IP Addressing and Services Commands: idle through ip local-proxy-arp
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IP Addressing and Services Commands: ip mask-reply through ip web-cache redirect
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IP Addressing and Services Commands: L through R
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IP Addressing and Services Commands: serverfarm through show ip nat
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IP Addressing and Services Commands: show ip nhrp through synguard
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IP Addressing and Services Commands: T through W
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Table Of Contents
show ip nhrp
To display the Next Hop Resolution Protocol (NHRP) cache, use the show ip nhrp EXEC command.
show ip nhrp [detail | purge] | [type number [detail]] | [dynamic | incomplete | nhs | static [type number] [detail]]
Syntax Description
detail
(Optional) Displays detailed information about NHRP cache.
purge
(Optional) Displays NHRP cache purge information.
type number
(Optional) Displays the interface type and number in the NHRP cache. See Table 26 for types, number ranges, and descriptions.
dynamic
(Optional) Displays only the dynamic (learned) IP-to-nonbroadcast multiaccess address (NBMA) cache entries. See Table 26 for types, number ranges, and descriptions.
incomplete
(Optional) Displays information about an incomplete cache. See Table 26 for types, number ranges, and descriptions.
nhs
(Optional) Displays information about the next-hop server (NHS). See Table 26 for types, number ranges, and descriptions.
static
(Optional) Displays only the static IP-to-NBMA address entries in the cache (configured using the ip nhrp map command). See Table 26 for types, number ranges, and descriptions.
Command Modes
EXEC
Command History
Usage Guidelines
Table 26 lists the valid types, number ranges, and descriptions for the type and number optional arguments.
Note
The valid types can vary according to the platform and interfaces on the platform.
Examples
The following is sample output from the show ip nhrp command:
Router# show ip nhrp10.0.0.2 255.255.255.255, ATM0/0 created 0:00:43 expire 1:59:16Type: dynamic Flags: authoritativeNBMA address: 11.1111.1111.1111.1111.1111.1111.1111.1111.1111.1110.0.0.1 255.255.255.255, Tunnel0 created 0:10:03 expire 1:49:56Type: static Flags: authoritativeNBMA address: 11.1.1.2Table 27 describes the significant fields shown in the display.
Related Commands
ip nhrp map
Statically configures the IP-to-NBMA address mapping of IP destinations connected to an NBMA network.
show ip nhrp traffic
Displays NHRP traffic statistics.
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
Syntax Description
This command has no arguments or keywords.
Command Modes
EXEC
Command History
Examples
The following is sample output from the show ip nhrp traffic command:
Router# show ip nhrp trafficTunnel0request packets sent: 2request packets received: 4reply packets sent: 4reply packets received: 2register packets sent: 0register packets received: 0error packets sent: 0error packets received: 0Table 28 describes the significant fields shown in the display.
show ip redirects
To display the address of a default gateway (router) and the address of hosts for which an Internet Control Message Protocol (ICMP) redirect message has been received, use the show ip redirects command in user EXEC or privileged EXEC mode.
show ip redirects
Syntax Description
This command has no arguments or keywords.
Command Modes
User EXEC
Privileged EXECCommand History
Usage Guidelines
This command displays the default router (gateway) as configured by the ip default-gateway command.
The ip mtu command enables the router to send ICMP redirect messages.
Examples
The following is sample output from the show ip redirects command:
Router# show ip redirectsDefault gateway is 172.89.80.29Host Gateway Last Use Total Uses Interface172.16.1.111 172.16.80.240 0:00 9 Ethernet0172.16.1.4 172.16.80.240 0:00 4 Ethernet0Related Commands
show ip route dhcp
To display the routes added to the routing table by the Cisco IOS Dynamic Host Configuration Protocol (DHCP) server and relay agent, use the show ip route dhcp command in privileged EXEC configuration mode.
show ip route [vrf vrf-name] dhcp [ip-address]
Syntax Description
vrf
(Optional) Specifies VPN routing and forwarding instance.
vrf-name
(Optional) Name of the VRF.
ip-address
(Optional) Address about which routing information should be displayed.
Defaults
No default behavior or values
Command Modes
Privileged EXEC
Command History
Usage Guidelines
To display information about global routes, use the show ip route dhcp command. To display routes in the VRF routing table, use the show ip route vrf vrf-name dhcp command.
Examples
The following is sample output from the show ip route dhcp command when entered without an address. This command lists all routes added by the Cisco IOS DHCP server and relay agent.
Router# show ip route dhcp10.5.5.56/32 is directly connected, ATM0.210.5.5.217/32 is directly connected, ATM0.2The following is sample output from the show ip route dhcp command when an address is specified. The output shows the details of the address with the server address (who assigned it) and the lease expiration time.
Router# show ip route dhcp 55.5.5.21710.5.5.217 is directly connected, ATM0.2DHCP Server: 10.9.9.10 Lease expires at Nov 08 2001 01:19 PMThe following is sample output from the show ip route vrf vrf-name dhcp command when entered without an address:
Router# show ip route vrf red dhcp10.5.5.218/32 is directly connected, ATM0.2The following is sample output from the show ip route vrf vrf-name dhcp command when an address is specified. The output shows the details of the address with the server address (who assigned it) and the lease expiration time.
Router# show ip route vrf red dhcp 55.5.5.21810.5.5.218/32 is directly connected, ATM0.2DHCP Server: 10.9.9.10 Lease expires at Nov 08 2001 03:15PMRelated Commands
clear ip route dhcp
Removes routes from the routing table added by the DHCP server and relay agent for the DHCP clients on unnumbered interfaces.
show ip slb conns
To display the active IOS SLB connections, use the show ip slb conns privileged EXEC command.
show ip slb conns [vserver virtserver-name] [client ip-address] [detail]
Syntax Description
Defaults
If no options are specified, the command displays output for all active IOS SLB connections.
Command Modes
Privileged EXEC
Command History
12.0(7)XE
This command was introduced.
12.1(5)T
This command was integrated into Cisco IOS Release 12.1(5)T.
Examples
The following example shows IOS SLB active connection data:
Router# show ip slb connsvserver prot client real state----------------------------------------------------------------------------TEST TCP 10.150.72.183:328 10.80.90.25:80 INITTEST TCP 10.250.167.226:423 10.80.90.26:80 INITTEST TCP 10.234.60.239:317 10.80.90.26:80 ESTABTEST TCP 10.110.233.96:747 10.80.90.26:80 ESTABTEST TCP 10.162.0.201:770 10.80.90.30:80 CLOSINGTEST TCP 10.22.225.219:995 10.80.90.26:80 CLOSINGTEST TCP 10.2.170.148:169 10.80.90.30:80 ZOMBIETable 29 describes the significant fields shown in the display.
show ip slb dfp
To display DFP manager and agent information such as passwords, timeouts, retry counts, and weights, use the show ip slb dfp privileged EXEC command.
show ip slb dfp [agent ip-address port-number | detail | weights]
Syntax Description
Defaults
If no options are specified, the command displays summary information.
Command Modes
Privileged EXEC
Command History
12.0(7)XE
This command was introduced.
12.1(5)T
This command was integrated into Cisco IOS Release 12.1(5)T.
Examples
The following example shows IOS SLB DFP data:
router# show ip slb dfp detailDFP Manager:Current passwd:NONE Pending passwd:NONEPasswd timeout:0 secUned errors:0DFP Agent 172.16.2.34:61936 Connection state:ConnectedTimeout = 0 Retry Count = 0 Interval = 180 (Default)Security errors = 0Last message received:10:20:26 UTC 11/02/99Last reported Real weights for Protocol TCP, Port wwwHost 10.17.17.17 1 Weight 1Host 10.68.68.68 Bind ID 4 Weight 4Host 10.85.85.85 Bind ID 5 Weight 5Last reported Real weights for Protocol TCP, Port 22Host 10.17.17.17 Bind ID 111 Weight 111router# show ip slb dfp weightsReal IP Address 10.17.17.17 Protocol TCP Port 22 Bind_ID 111 Weight 111Set by Agent 172.16.2.3458490 at 132241 UTC 12/03/99Real IP Address 10.17.17.17 Protocol TCP Port www Bind_ID 1 Weight 1Set by Agent 172.16.2.3458490 at 132241 UTC 12/03/99Real IP Address 10.68.68.68 Protocol TCP Port www Bind_ID 4 Weight 4Set by Agent 172.44.2.3458490 at 132241 UTC 12/03/99Real IP Address 10.85.85.85 Protocol TCP Port www Bind_ID 5 Weight 5Set by Agent 172.16.2.3458490 at 132241 UTC 12/03/99router# show ip slb dfpDFP Manager:Current passwd:NONE Pending passwd:NONEPasswd timeout:0 secAgent IP Port Timeout Retry Count Interval---------------------------------------------------------------172.16.2.34 61936 0 0 180 (Default)Table 30 describes the significant fields shown in the display.
show ip slb reals
To display information about the real servers, use the show ip slb reals command in privileged EXEC mode.
show ip slb reals [sfarm server-farm] [detail]
Syntax Description
sfarm server-farm
(Optional) Displays information about those real servers associated with the specified server farm or firewall farm.
detail
(Optional) Displays detailed information.
Command Modes
Privileged EXEC
Command History
Usage Guidelines
If no options are specified, the command displays information about all real servers.
Examples
The following is sample output from the show ip slb reals command:
Router# show ip slb realsreal farm name weight state conns--------------------------------------------------------------------10.80.2.112 FRAG 8 OUTOFSERVICE 010.80.5.232 FRAG 8 OPERATIONAL 010.80.15.124 FRAG 8 OUTOFSERVICE 010.254.2.2 FRAG 8 OUTOFSERVICE 010.80.15.124 LINUX 8 OPERATIONAL 010.80.15.125 LINUX 8 OPERATIONAL 010.80.15.126 LINUX 8 OPERATIONAL 010.80.90.25 SRE 8 OPERATIONAL 22010.80.90.26 SRE 8 OPERATIONAL 21610.80.90.27 SRE 8 OPERATIONAL 21610.80.90.28 SRE 8 TESTING 110.80.90.29 SRE 8 OPERATIONAL 22110.80.90.30 SRE 8 OPERATIONAL 22410.80.30.3 TEST 100 READY_TO_TEST 010.80.30.4 TEST 100 READY_TO_TEST 010.80.30.5 TEST 100 READY_TO_TEST 010.80.30.6 TEST 100 READY_TO_TEST 0Table 31 describes the fields shown in the display.
The following is sample output from the show ip slb reals detail command for a real server in a server farm:
Router# show ip slb reals detail10.10.1.7, S, state = OPERATIONAL, type = serverconns = 0, dummy_conns = 0, maxconns = 4294967295weight = 8, weight(admin) = 8, metric = 0, remainder = 0reassign = 3, retry = 60failconn threshold = 8, failconn count = 0failclient threshold = 2, failclient count = 0total conns established = 0, total conn failures = 0server failures = 0The following is sample output from the show ip slb reals detail command for a real server in a firewall farm:
Router# show ip slb reals detail10.10.3.2, F, state = OPERATIONAL, type = firewallconns = 0, dummy_conns = 0, maxconns = 4294967295weight = 8, weight(admin) = 8, metric = 0, remainder = 0total conns established = 8377, hash count = 0server failures = 0interface FastEthernet1/0, MAC 0000.0c41.1063Table 32 describes the fields shown in the above detail displays.
show ip slb serverfarms
To display information about the server farms, use the show ip slb serverfarms privileged EXEC command.
show ip slb serverfarms [name serverfarm-name] [detail]
Syntax Description
name
(Optional) Displays information about only a particular server farm.
serverfarm-name
(Optional) Name of the server farm.
detail
(Optional) Displays detailed server farm information.
Defaults
No default behavior or values.
Command Modes
Privileged EXEC
Command History
12.0(7)XE
This command was introduced.
12.1(5)T
This command was integrated into Cisco IOS Release 12.1(5)T.
Examples
The following example shows IOS SLB server farm data:
router# show ip slb serverfarmsserver farm predictor reals bind id-------------------------------------------------FRAG ROUNDROBIN 4 0LINUX ROUNDROBIN 3 0SRE ROUNDROBIN 6 0TEST ROUNDROBIN 4 0Table 33 describes the significant fields shown in the display.
show ip slb stats
To display IOS SLB statistics, use the show ip slb stats privileged EXEC command.
show ip slb stats
Syntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values.
Command Modes
Privileged EXEC
Command History
12.0(7)XE
This command was introduced.
12.1(5)T
This command was integrated into Cisco IOS Release 12.1(5)T.
Examples
The following example shows IOS SLB statistics:
router# show ip slb statsPkts via normal switching: 530616Pkts via special switching:1812710Connections Created: 783774Connections Established: 633418Connections Destroyed: 782752Connections Reassigned: 0Zombie Count: 0Table 34 describes the significant fields shown in the display.
show ip slb sticky
To display the entries in the IOS SLB sticky database, use the show ip slb sticky privileged EXEC command.
show ip slb sticky [client ip-address]
Syntax Description
client
(Optional) Displays only those sticky database entries associated with a particular client IP address.
ip-address
(Optional) IP address of the client.
Defaults
If no options are specified, the command displays information about all virtual servers.
Command Modes
Privileged EXEC
Command History
12.0(7)XE
This command was introduced.
12.1(5)T
This command was integrated into Cisco IOS Release 12.1(5)T.
Examples
The following example shows the entries in the IOS SLB sticky database:
Router# show ip slb stickyclient group real conns ftp-cntrl--------------------------------------------------------------10.10.2.12 4097 10.10.3.2 1 0Table 35 describes the significant fields shown in the display.
show ip slb vservers
To display information about the virtual servers, use the show ip slb vservers privileged EXEC command.
show ip slb vservers [name virtserver-name] [detail]
Syntax Description
name
(Optional) Displays information about only this virtual server.
virtserver-name
(Optional) Name of the virtual server.
detail
(Optional) Displays detailed virtual server information.
Defaults
If no options are specified, the command displays information about all virtual servers.
Command Modes
Privileged EXEC
Command History
12.0(7)XE
This command was introduced.
12.1(5)T
This command was integrated into Cisco IOS Release 12.1(5)T.
Examples
The following example shows virtual server data:
router# show ip slb vserversslb vserver prot virtual state conns---------------------------------------------------------------------TEST TCP 10.80.254.3:80 OPERATIONAL 1013TEST21 TCP 10.80.254.3:21 OUTOFSERVICE 0TEST23 TCP 10.80.254.3:23 OUTOFSERVICE 0Table 36 describes the significant fields shown in the display.
show ip snat
To display active Stateful Network Address Translation (SNAT) translations, use the show ip snat command in EXEC mode.
show ip snat [distributed [verbose] | peer ip-address]
Syntax Description
Command Modes
EXEC
Command History
Examples
The following is sample output from the show ip snat distributed command for stateful NAT connected peers:
Router# show ip snat distributedStateful NAT Connected PeersSNAT: Mode PRIMARY:State READY:Local Address 192.168.123.2:Local NAT id 100:Peer Address 192.168.123.3:Peer NAT id 200:Mapping List 10The following is sample output from the show ip snat distributed verbose command for stateful NAT connected peers:
Router# show ip snat distributed verboseSNAT: Mode PRIMARYStateful NAT Connected Peers:State READY:Local Address 192.168.123.2:Local NAT id 100:Peer Address 192.168.123.3:Peer NAT id 200:Mapping List 10:InMsgs 7, OutMsgs 7, tcb 0x63EBA408, listener 0x0show ip sockets
To display IP socket information, use the show ip sockets command in user EXEC or privileged EXEC mode.
show ip sockets
Syntax Description
This command has no keywords or arguments.
Defaults
No default behavior or values.
Command Modes
User EXEC
Privileged EXECCommand History
Usage Guidelines
Use this command to verify that the socket being used is opening correctly. If there is a local and remote endpoint, a connection is established with the ports indicated.
Examples
The following is sample output from the show ip sockets command:
Router# show ip socketsProto Remote Port Local Port In Out Stat TTY OutputIF17 10.0.0.0 0 172.16.186.193 67 0 0 1 017 172.68.191.135 514 172.16.191.129 1811 0 0 0 017 172.16.135.20 514 172.16.191.1 4125 0 0 0 017 172.16.207.163 49 172.16.186.193 49 0 0 9 0
