View the Topology Message Status

About this task

View topology message status to view the interconnections between Layer 2 devices in a network.

Procedure

To enter User EXEC mode, log on to the switch.
Show the contents of the topology table:

show autotopology nmm-table

Unless the switch is physically connected to other devices in the network, this topology will be blank.

Example

Note

In the following example, the column “ChassisType” uses a generic name. When you use the show autotopology nmm-table, your switch displays the actual chassis type.

Switch:1(config)#show autotopology nmm-table 
==========================================================================================
                                      Topology Table 
==========================================================================================
Local                                                                              Rem  
Port     IpAddress       SegmentId MacAddress   ChassisType            BT LS  CS   Port 
------------------------------------------------------------------------------------------
0/0      192.0.2.81     0x000000  0030ab707a00 ChassisType 1          12 Yes HtBt  0/0 
1/1      192.0.2.81     0x000000  0050ea268800 ChassisType 2          12 Yes HtBt  1/50 
1/42     192.0.2.81     0x000000  070ab307aa00 ChassisType 3          12 Yes HtBt  1/1 
2/1      192.0.2.81     0x000000  0030ab57ab00 ChassisType 4          12 Yes HtBt  1/49 
2/2      192.0.2.81     0x000000  0030ab307af0 ChassisType 5          12 Yes HtBt  1/50 
2/41     192.0.2.81     0x000000  00e0ba327c00 ChassisType 6          12 Yes HtBt  2/1 
2/42/1   192.0.2.81     0x000000  0050eb127400 ChassisType 7          12 Yes HtBt  1/2

Note

When a peer switch is running an older software version that does not include support for SONMP hello messages with channelization information, it can only show the slot/port. It cannot show the sub-port.