ICX port blocking

[clayton_taverni]

I've got a 7750 as my core router and 1GB connections to 9 sites with 7450 routers.  7 of the connections work and 2 do not.  As far as I can tell, the configs are all the same (other than IP addresses) but all four of the ports show as down with port states Blocking.  STP is disabled on all four ports.  If I disable and then enable the ports, they go down immediately.  As far as I know, the AT&T links between the sites are all good.  Suggestions?

[david_ellis_h2n]

You say there are 2 sites, but reference 4 ports. Do you have dual connections to the two sites?

[clayton_taverni]

2 ports on the 7750 and 1 port on each of the 7450s.  All down, all Blocking.

[alex_shalima]

Hi Clayton,

Are you using fiber? if so, as far as I know the SFP+ ports are defaulted to 10G mode and have to be switched manually to work in 1G mode.


Best,
Alex

[BenBeck]

"Blocking" is just the default verbiage in the STP output. If the port is down at layer 1 (state down), then the STP blocking is irrelevant. I'd check speed-duplex, optics, media, etc.