Table Of Contents
Display Spanning-Tree Information
Monitoring the Switch
This section describes how to monitor the switch using a variety of commands:
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Check System Status—Display global system status information for the switch.
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Check System Status
Use the show system command to display global system status information for the switch.
To check the system status, perform this task in privileged mode:
This example shows how to check the system status:
4003-ER-F1> (enable) show systemPS1-Status PS2-Status Fan-Status Temp-Alarm Sys-Status Uptime d,h:m:s Logout---------- ---------- ---------- ---------- ---------- -------------- ---------ok none ok off ok 1,19:43:11 20 minPS1-Type PS2-Type Modem Baud Traffic Peak Peak-Time---------- ---------- ------- ----- ------- ---- -------------------------WS-C4008 none disable 9600 0% 0% Fri Apr 9 1999, 18:54:17System Name System Location System Contact------------------------ ------------------------ ------------------------4003-ER-F1 Bldg 1 Equip Room sysadmin@bigcorp.com4003-ER-F1> (enable)Check Module Status
Use the show module command to display module status information for the switch. Specify a module number to display information for that module only.
To check module status, perform this task in privileged mode:
This example shows how to check the status of all modules in the switch:
Console> (enable) show moduleMod Slot Ports Module-Type Model Status--- ---- ----- ------------------------- ------------------- --------1 1 0 Switching Supervisor WS-X4012 ok2 2 6 1000BaseX Ethernet WS-X4306 ok3 3 6 1000BaseX Ethernet WS-X4306 okMod Module-Name Serial-Num--- ------------------- --------------------1 JAB023806JR2 JAB0240004D3 JAB024000YYMod MAC-Address(es) Hw Fw Sw--- -------------------------------------- ------ ---------- -----------------1 00-10-7b-f8-03-00 to 00-10-7b-f8-06-ff 0.1 4.4(1) 4.5(1)2 00-10-7b-f6-b1-a8 to 00-10-7b-f6-b1-ad 0.23 00-10-7b-f6-b2-1a to 00-10-7b-f6-b2-1f 0.2Console> (enable)This example shows how to check the status of an individual module in the switch:
Console> (enable) show module 2Mod Slot Ports Module-Type Model Status--- ---- ----- ------------------------- ------------------- --------2 2 6 1000BaseX Ethernet WS-X4306 okMod Module-Name Serial-Num--- ------------------- --------------------2 JAB0240004DMod MAC-Address(es) Hw Fw Sw--- -------------------------------------- ------ ---------- -----------------2 00-10-7b-f6-b1-a8 to 00-10-7b-f6-b1-ad 0.2Console> (enable)Check Port Status
Use the show port command to display switch port status information. Specify a module number to display information for ports on that module only. Specify a module number and port number to display information for that port only.
To check port status, perform this task in privileged mode:
This example shows how to check the status of all ports on module 3:
Console> (enable) show port 3Port Name Status Vlan Level Duplex Speed Type----- ------------------ ---------- ---------- ------ ------ ----- ------------3/1 connected 10 normal full 1000 1000BaseSX3/2 connected 10 normal full 1000 1000BaseSX3/3 connected 20 normal full 1000 1000BaseSX3/4 connected 40 normal full 1000 1000BaseSX3/5 notconnect 1 normal full 1000 No GBIC3/6 notconnect 1 normal full 1000 No GBICPort Security Secure-Src-Addr Last-Src-Addr Shutdown Trap IfIndex----- -------- ----------------- ----------------- -------- -------- -------3/1 disabled No disabled 153/2 disabled No disabled 163/3 disabled No disabled 173/4 disabled No disabled 183/5 disabled No disabled 193/6 disabled No disabled 20Port Send FlowControl Receive FlowControl RxPause TxPause Unsupportedadmin oper admin oper opcodes----- -------- -------- -------- -------- ------- ------- -----------3/1 desired on desired on 0 0 03/2 desired on desired on 0 0 03/3 desired on desired on 0 0 03/4 desired on desired on 0 0 03/5 desired off off off 0 0 03/6 desired off off off 0 0 0Port Status Channel Channel Neighbor Neighbormode status device port----- ---------- --------- ----------- ------------------------- ----------3/1 connected off not channel3/2 connected off not channel3/3 connected off not channel3/4 connected off not channel3/5 notconnect off not channel3/6 notconnect off not channelPort Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize----- ---------- ---------- ---------- ---------- ---------3/1 - 0 0 0 03/2 - 0 0 0 03/3 - 0 0 0 03/4 - 0 0 0 03/5 - 0 0 0 03/6 - 0 0 0 0Port Single-Col Multi-Coll Late-Coll Excess-Col Carri-Sen Runts Giants----- ---------- ---------- ---------- ---------- --------- --------- ---------3/1 0 0 0 0 0 0 03/2 0 0 0 0 0 0 03/3 0 0 0 0 0 0 03/4 0 0 0 0 0 0 03/5 0 0 0 0 0 0 03/6 0 0 0 0 0 0 0Last-Time-Cleared--------------------------Fri Apr 30 1999, 18:54:17Console> (enable)Check Port Capabilities
Use the show port capabilities command to display information about feature support for a specific port. Specify a module number to display information for ports on that module only. Specify a module number and port number to display information for that port only.
To check port capabilities, perform this task in privileged mode:
Display switch port capability information.
show port capabilities [mod_num[/port_num]]
This example shows how to check the port capabilities of a specific port:
Console> (enable) show port capabilities 3/1Model WS-X4306Port 3/1Type 1000BaseSXSpeed 1000Duplex fullTrunk encap type 802.1QTrunk mode on,off,desirable,auto,nonegotiateChannel 3/1-2Flow control receive-(off,on,desired),send-(off,on,desired)Security yesMembership staticFast start yesRewrite noConsole> (enable)Check Network Connectivity
After you assign an IP address and a default gateway, and at least one switch port is connected to the network and properly configured, you should be able to communicate with other nodes on the network.
To check whether the switch is properly connected and configured, perform this task in privileged mode:
This example shows how to check connectivity out a switch port using the ping and traceroute commands:
Console> (enable) ping 10.10.1.1010.10.1.10 is aliveConsole> (enable) ping -s 5509-ER-F1 1200 4PING 10.10.1.10: 1200 data bytes1208 bytes from 10.10.1.10: icmp_seq=0. time=9 ms1208 bytes from 10.10.1.10: icmp_seq=1. time=11 ms1208 bytes from 10.10.1.10: icmp_seq=2. time=16 ms1208 bytes from 10.10.1.10: icmp_seq=3. time=10 ms----10.10.1.10 PING Statistics----4 packets transmitted, 4 packets received, 0% packet lossround-trip (ms) min/avg/max = 9/11/16Console> (enable) traceroute 10.10.10.100traceroute to dns-server-1.bigcorp.com (10.10.10.100), 30 hops max, 40 byte packets1 rsm-vlan1-if.bigcorp.com (10.10.1.1) 2 ms 2 ms 1 ms2 dns-server-1.bigcorp.com (10.10.10.100) 2 ms 2 ms 1 msConsole> (enable) traceroute dns-server-1 1400traceroute to dns-server-1.bigcorp.com (10.10.10.100), 30 hops max, 1440 byte packets1 rsm-vlan1-if.bigcorp.com (10.10.1.1) 1 ms 2 ms 1 ms2 dns-server-1.bigcorp.com (10.10.10.100) 2 ms 2 ms 2 msConsole> (enable)Display Spanning-Tree Information
Spanning tree prevents the formation of network loops. The switch maintains an instance of spanning tree for every VLAN.
To display spanning-tree information for the switch, perform this task in privileged mode:
This example shows how to display spanning-tree information for VLAN 10:
Console> (enable) show spantree 10VLAN 10Spanning tree enabledSpanning tree type ieeeDesignated Root 00-10-7b-f8-03-09Designated Root Priority 32768Designated Root Cost 0Designated Root Port 1/0Root Max Age 20 sec Hello Time 2 sec Forward Delay 15 secBridge ID MAC ADDR 00-10-7b-f8-03-09Bridge ID Priority 32768Bridge Max Age 20 sec Hello Time 2 sec Forward Delay 15 secPort Vlan Port-State Cost Priority Fast-Start Group-Method--------- ---- ------------- ----- -------- ---------- ------------2/1-2 10 forwarding 3 32 disabled channel3/1 10 forwarding 4 32 enabled3/2 10 forwarding 4 32 enabledConsole> (enable)View Neighbor Information
Use the show cdp neighbors command to display information about directly connected Cisco devices. Specify a module number to display information for that module only. Specify a module number and port number to display information for that port only. The vlan, duplex, and capabilities keywords display different information about neighbor devices. The detail keyword shows detailed neighbor information.
To display neighbor information, perform this task in privileged mode:
This example shows how to display summary information for all neighboring Cisco devices:
Console> (enable) show cdp neighborsCapability Codes: R - Router, T - Trans Bridge, B - Source Route BridgeS - Switch, H - Host, I - IGMP, r - RepeaterPort Device-ID Port-ID Platform Capability-------- ----------------------- ----------------- ------------------ ----------2/1 003812064 1/1 WS-C5509 T B S2/2 003812064 1/2 WS-C5509 T B SConsole> (enable)This example shows how to display detailed neighbor information for Cisco devices connected to a particular port:
Console> (enable) show cdp neighbors 2/1 detailPort (Our Port): 2/1Device-ID: 003812064Device Addresses:IP Address: 10.10.1.10Holdtime: 130 secCapabilities: TRANSPARENT_BRIDGE SR_BRIDGE SWITCHVersion:WS-C5509 Software, Version McpSW: 4.5(1) NmpSW: 4.5(1)Copyright (c) 1995-1999 by Cisco SystemsPlatform: WS-C5509Port-ID (Port on Neighbor's Device): 1/1Console> (enable)View the Forwarding Table
The switch makes forwarding decisions using a table (called the EARL or CAM table) that maps switch ports to MAC addresses.
To display the contents of the forwarding table, perform this task in privileged mode:
This example shows how to display all dynamically learned forwarding table entries for VLAN 10:
Console> (enable) show cam dynamic 10* = Static Entry. + = Permanent Entry. # = System Entry. R = Router Entry.X = Port Security EntryVLAN Dest MAC/Route Des [CoS] Destination Ports or VCs / [Protocol Type]---- ------------------ ----- -------------------------------------------10 00-10-0d-3e-8c-00 2/1 [ALL]10 00-01-70-2C-75-80 3/1 [ALL]10 00-01-70-3D-60-10 3/2 [ALL]Total Matching CAM Entries Displayed = 3Console> (enable)View User Sessions
To display the current user sessions on the switch, perform this task in privileged mode:
This example shows how to display information about user sessions on the switch:
Console> (enable) show usersConsole Port------------InactiveTelnet Sessions User---------------------------------------- ------------------------------sam-pc.bigcorp.comjake-nt.bigcorp.comConsole> (enable)This example shows how to display information about user sessions using the noalias keyword to display the IP addresses of connected hosts:
Console> (enable) show users noaliasConsole Port------------InactiveTelnet Sessions User---------------------------------------- ------------------------------10.10.10.1210.10.20.46Console> (enable)View Version Information
To display the version information for the switch, perform this task in privileged mode:
This example shows how to display version information for the switch:
Console> (enable) show versionWS-C4003 Software, Version NmpSW: 4.5(1)Copyright (c) 1995-1999 by Cisco Systems, Inc.NMP S/W compiled on Mar 29 1999, 15:49:45GSP S/W compiled on Mar 29 1999, 10:56:40System Bootstrap Version: 4.4(1)Hardware Version: 0.1 Model: WS-C4003 Serial #: JAB023806LNMod Port Model Serial # Versions--- ---- ---------- -------------------- ---------------------------------1 0 WS-X4012 JAB023806LN Hw : 0.1Gsp: 4.5(1.0)Nmp: 4.5(1)2 34 WS-X4232 JAB024100BL Hw : 1.03 6 WS-X4306 JAB024000YY Hw : 0.2DRAM FLASH NVRAMModule Total Used Free Total Used Free Total Used Free------ ------- ------- ------- ------- ------- ------- ----- ----- -----1 32768K 16657K 16111K 12288K 6445K 5843K 480K 90K 390KUptime is 1 day, 20 hours, 2 minutesConsole> (enable)