erspan session keeps shutdown

Unanswered Question
Aug 11th, 2009
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Hi to all,


I've configured an erspan session between two Cat6509 but in the source, the monitor session is always "shutdown" and it doesn't change when i put the no shutdown command.


Here is the configuration:

SOURCE

monitor session 12 type erspan-source

shutdown ->***THIS IS THE ONE THAT NEVER GOES OUT***

source vlan 121

destination

erspan-id 112

ip address 10.233.48.228

origin ip address 10.233.48.248

DESTINATION

monitor session 12 type erspan-destination

destination interface Fa4/3

source

erspan-id 112

ip address 10.233.48.228


When i do a sh monitor session 12 detail it says in the status field Admin Disabled


Do you know what can be causing this?


Thanks in advance for your help.

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alfonso.cornejo Tue, 08/11/2009 - 13:48
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*SOLVED*


The problem was that the next hop address of the source (10.233.48.228) was known by a tunnel and that is not supported by erspan, just have to take the destination address out of the tunnel.


Here is the cisco information:


%SPAN-5-ERSPAN_ADJ_TUNNEL: ERSPAN Destination behind a tunnel. Shutting down session [dec]

The next hop to the IP address specified as the ERSPAN destination lies behind a tunnel. This configuration is not supported. The ERSPAN session is shut down when such a configuration is detected.


Recommended Action: Specify another ERSPAN destination IP address that does not have a tunnel as the next-hop adjacency.


Related documents- No specific documents apply to this error message.


Hope this help someone in the future...

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