Connectivity Problems

Use the following general tasks to isolate connectivity problems:

If you contact technical support staff to help troubleshoot connectivity problems, always provide source and destination IP pairs to facilitate in troubleshooting. Be sure to provide both working and non-working pairs for comparison.

Example

Switch:1#show interface vlan

===============================================================================================
                                            Vlan Basic
===============================================================================================
VLAN                                MSTP
ID    NAME             TYPE         INST_ID PROTOCOLID   SUBNETADDR      SUBNETMASK      VRFID
------------------------------------------------------------------------------------------------
1     Default          byPort       0       none         N/A             N/A         0
2     VLAN-2           byPort       0       none         N/A             N/A         0
50    mcast_smlt_3     byPort       1       none         N/A             N/A         0
60    mcast_smlt_4     byPort       1       none         N/A             N/A         0

All 4 out of 4 Total Num of Vlans displayed


==============================================================================                                   Vlan Port
==============================================================================
VLAN PORT               ACTIVE             STATIC             NOT_ALLOW
ID   MEMBER             MEMBER             MEMBER             MEMBER
------------------------------------------------------------------------------
1    1/5-1/8,1/10-1/48, 1/5-1/8,1/10-1/48, 
     2/2-2/4            2/2-2/4

2

50   1/1,2/1/3-2/1/4    1/1,2/1/3-2/1/4

60   1/3-1/4            1/3-1/4



All 4 out of 4 Total Num of Port Entries displayed


==============================================================================
                              VLAN VRF Association
==============================================================================
VLAN  VRF
ID    NAME
------------------------------------------------------------------------------
1     GlobalRouter
2     GlobalRouter
50    GlobalRouter
60    GlobalRouter
4086  GlobalRouter
4087  GlobalRouter

--More-- (q = quit)