04-24-2017 11:32 AM - edited 03-11-2019 12:39 AM
Hello,
I hope that you can help me figuring out why am I not able to see any EAPoL messages on my remote SPAN port configuration, this is my scenario:
Laptop (authenticating) -- Switch1 -- Switch2 -- Laptop (Monitor)
For more detail scenario
Laptop -- <port g0/2> Switch1 (Cisco 3560-CG) <port g0/10> -- <port g1/0/15> Switch2 (Cisco 3750G) <port g2/0/2>
The configuration from switch1:
monitor session 1 source interface Gi0/1 - 7
monitor session 1 destination remote
The configuration from Switch2:
monitor session 2 destination interface Gi2/0/2
monitor session 2 source remote
AS you can see I'm using remote span configuration and using remote
When I turn on
Now what's important to mention is that if I use a local port on the 3560-CG, without any remote span am able to see all the packets,
Thanks and I hope that someone can help me.
Regards
Solved! Go to Solution.
04-26-2017 02:27 PM
Hi
See the following Cisco documenmtation:
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3560/software/release/12-2_52_se/configuration/guide/3560scg/swspan.html#wp1073772
It states that "RSPAN does not support BPDU packet monitoring or other Layer 2 switch protocols." whereas SPAN does
EAPOL would fall under this category so wouldn't be supported by RSPAN. Better explantion of this can be seen in the following blog:
https://mellowd.co.uk/ccie/?p=2403
hth
Andy
04-24-2017 02:35 PM
As far as i know EAP packets, are not captured on switch ports at all. At least not when i last tried it. you probably will need to use another "hub" between the switch and the device.
04-24-2017 02:41 PM
04-26-2017 02:27 PM
Hi
See the following Cisco documenmtation:
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3560/software/release/12-2_52_se/configuration/guide/3560scg/swspan.html#wp1073772
It states that "RSPAN does not support BPDU packet monitoring or other Layer 2 switch protocols." whereas SPAN does
EAPOL would fall under this category so wouldn't be supported by RSPAN. Better explantion of this can be seen in the following blog:
https://mellowd.co.uk/ccie/?p=2403
hth
Andy
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