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%L2_AGING-SP-2-DEC_EN_FAIL: Failed to initialize Distributed EtherChannel

Hi Sir,

I have an FWSM (running app software 2.3(3)) installed on a Catalyst 6513 (running Native IOS 12.2(18)SXD6).

I'm getting the following error message from the switch quite frequently, especially when adding SVIs or assigning VLANs to the FWSM:

%L2_AGING-SP-2-DEC_EN_FAIL: Failed to initialize Distributed EtherChannel

Recommended action is to remove the monitor session reserved for service modules:

A more detailed explanation can be found in the FWSM config guide, as follows:


For each FWSM in a switch using Cisco IOS software, the SPAN reflector feature is enabled. This feature enables multicast traffic (and other traffic that requires central rewrite engine) to be switched when coming from the FWSM. The SPAN reflector feature uses one SPAN session. To disable this feature, enter the following command:

Router(config)# no monitor session servicemodule


I'm interested to know the following:

(1) Any operational impact, as far as the FWSM is concerned, if I don't disable the SPAN reflector feature?

(2) If I disable the SPAN reflector, any operational impact to the switch, FWSM, or other service modules?

Please advise.

Thank you.


Lim TS


Re: %L2_AGING-SP-2-DEC_EN_FAIL: Failed to initialize Distributed

SPAN is used if you want to monitor switch traffic on a port or on a VLAN. If you have an IDS or any network sniffing device used on your network, then you propably use SPAN to capture the traffic and send to the sniffing device. If you are not using anything like this, then I guess SPAN can be disabled. Any more thoughts on this?

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