[c-nsp] Cisco ME3600X IOS 15.5.3S7 and pseudowires

[David Wilkinson]

Hi all,

Does anyone know if there is special knob or config change needed when 
using pseudowires on a Cisco ME3600X when running IOS 15.5.3S7 or 
15.6.2-SP4 vs 15.4(3)S9?

I was setting up a couple of EoMPLS circuits on pair of Cisco ME3600Xs 
and while the pseudowires would come up and a "show mpls l2transport vc" 
would show the sent counter increasing the receive counter at the remote 
end was 0.

After some troubleshooting I found that the ME3600X wasn't sending out 
any traffic over the pseudowire despite the sent counter increasing and 
had same issue with pseudowires setup with L2VPNs so wasn't limited to 
just EoMPLS. If the remote end wasn't one of the ME3600s then I could 
get one way traffic so the ME3600s are receiving traffic over the 
pseudowires correctly.

Upgrading from 15.5.3S7 to 15.6.2-SP4 didn't help, this versions are 
both showing as the Cisco recommended releases. I did find that if I 
downgraded them to 15.4(3)S9, then the pseudowires would work fine.
Given it works with 15.4(3)S9 I'm guessing there is config changes 
between 15.4 and 15.5 which isn't in the release notes or Cisco have 
released 2 horribly broken images and incorrectly marked them as 
recommend based on software quality, stability and longevity.

Regards

David
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