J-series and Cisco ME3400 L2 Issues

Giuliano (UOL) giulianocm at uol.com.br
Thu Feb 12 03:22:52 UTC 2009


We never had the problem, but, today, Juniper release the 9.4 version of 
Junos software.

Maybe you can check the release notes to see if you find something 
related to.



> Hello all!
> Recently, KanREN has begun purchasing Ethernet circuits from a new 
> provider who uses a Cisco ME3400 for CPE to provide the link to us. We 
> use primarly Juniper J-2320 and J-4350 routers for our site equipment 
> (running JunOS 9.3 Enhanced Services).
> We've seen a problem getting Layer2 to function correctly with various 
> speed and duplex settings. We tried every combo of hardcoded settings on 
> both sides but simply couldn't resolve some L2 errors and interface 
> resets. In the end, we found a stable setup with the J-series set to 
> auto/auto and the ME3400 set to 100/full.
> Has anyone else seen similar problem using either the J-series or an 
> ME3400? If so, did you ever find a complete resolution (or explanation)?
> Thanks for any insight!
> -- 
> Brad Fleming
> Network Engineer
> Kansas Research and Education Network
> Office:    785-856-9800 x.222
> Moblie:  785-865-7231
> NOC:     866-984-3662

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