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Port monitor for etherchannel

Muhammed AKYUZ
Level 1
Level 1

on 7600 SUP720 3B

I have port channel and there are two ports on that port channel

Group  Port-channel  Protocol    Ports

------+-------------+-----------+-----------------------------------------------

1      Po1(SD)          -        Gi0/1(D)   Gi0/2(D) 

is it possible to apply this command? does it work?

monitor session 3 source interface Gi0/1 rx

monitor session 3 destination remote vlan 201

monitor session 3 source interface Gi0/2 rx

monitor session 3 destination remote vlan 202

1 Reply 1

m.kafka
Level 4
Level 4

dear muhammed, you have to be careful with that!

Muhammed AKYUZ wrote:

on 7600 SUP720 3B

I have port channel and there are two ports on that port channel

Group  Port-channel  Protocol    Ports

------+-------------+-----------+-----------------------------------------------

1      Po1(SD)          -        Gi0/1(D)   Gi0/2(D) 

is it possible to apply this command? does it work?

monitor session 3 source interface Gi0/1 rx

monitor session 3 destination remote vlan 201

monitor session 3 source interface Gi0/2 rx

monitor session 3 destination remote vlan 202

7600, sup720 allows this:

http://www.cisco.com/en/US/docs/routers/7600/ios/12.1E/command/reference/m1.html#wp1237096

and:

http://www.cisco.com/en/US/docs/ios/lanswitch/command/reference/lsw_m1.html#wp1145478

But on catalyst platforms you find an explanation how monitor sessions interact with portchannels.

Explanation from this page:

http://www.cisco.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_9_ea1/configuration/guide/swspan.html (ws-c2900 series but possibly applies to all platforms)

EtherChannel—You can configure an EtherChannel  group as a source port but not as a SPAN destination port. SPAN  configuration fails if the destination port is part of an EtherChannel  group. When a channel group is configured as a SPAN source, the entire  group is monitored.

If a port is added to a monitored EtherChannel  group, the new port is added to the SPAN source port list. If a port is  removed from a monitored EtherChannel group, it is automatically removed  from the source port list. If the port is the only port in the  EtherChannel group, the EtherChannel group is removed from SPAN.

If a physical port that belongs to an EtherChannel  group is configured as a SPAN source or destination port, it is removed  from the EtherChannel group. After the port is removed from the SPAN  session, it rejoins the EtherChannel group.

Better use the interface portchannel instead of the physical ports.

Regards,

MiKa

PS your port channel is down...

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