Is it the only up port participating in that vlan?
On Fri, Apr 24, 2015 at 8:40 AM, Lukas Tribus <luky...@hotmail.com> wrote: >> Hello people, >> >> I am looking for an explanation for a strange port flap that I >> experienced this afternoon and out of desperation (and because I can not >> find an answer on Cisco, Google, you name it and I am not yet desperate >> enough to open a TAC case) I am posting here. >> >> Here is the situation: >> Catalyst 3750E has several VLANs. One VLAN has mac-learning disabled. >> The VLAN is tagged on one TenG interface and untagged on a GigE. >> The TenG interface went down due to a transmission problem. The GigE >> interface went Lineproto-down too. Thats weird. > > I would guess that the box connected to the GigE interface has some > kind of heartbeat running towards the other end of the network and > resets itself (or the interface) in case the communication breaks. Like a > "suicide-is-better-than-a-split-brain" protection? > > Seems strange for a Catalyst to drop the link in this case. Is the box > in a stack? > > > > Lukas > > > > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/