Are you running spanning tree ? Sent from my iPhone
On Jun 7, 2013, at 18:37, "Gavin Henry" <[email protected]> wrote: > Is this a server connected via two ports? > > Sent from my iPad 2 > > On 7 Jun 2013, at 23:12, John Neiberger <[email protected]> wrote: > >> Also, another interesting thing about this is that the output of "show >> ethernet mac-learning-log" stops at April 13th. I have no idea why. If a >> MAC address were jumping around, we'd see it in the MAC learning log...if >> it were up to date. What would cause a Juniper switch to stop logging to >> the MAC learning log? >> >> By the way, this is an EX4200 running 10.4R6.5. >> >> >> On Fri, Jun 7, 2013 at 4:07 PM, John Neiberger <[email protected]> wrote: >> >>> We're trying to troubleshoot an odd issue and this log output makes it >>> appear that a MAC address is flipping between interfaces. There are other >>> interfaces involved later in the logs. I'm starting to think this isn't >>> telling us what we think it's telling us. Does this indicate that the MAC >>> address really is being learned from multiple interfaces? The confusing >>> thing about the logs is the mention of l3nh. Is that layer three next hop? >>> If so, why are we seeing that in ethernet-level trace options and what is >>> the significance? >>> >>> I'm a little confused. Here is an example: >>> >>> Jun 4 13:07:22.953201 Attempt to add vlan sbc-core mac 00:08:25:fa:3c:82, >>> ifname ge-0/0/6.0, pnac_status 0, 0 >>> Jun 4 13:07:22.953312 vlan sbc-core mac 00:08:25:fa:3c:82 (tag 40), iif = >>> ge-0/0/6.0: present in FDB >>> Jun 4 13:07:22.953374 (3, 00:08:25:fa:3c:82) next-hop index change [1344 >>> -> 1328] >>> Jun 4 13:07:22.953562 KRT enqueue FDB (3, 00:08:25:fa:3c:82) nh-index 1328 >>> Jun 4 13:07:22.953712 krt_dequeue: type FDB op change 3, >>> 00:08:25:fa:3c:82 Direct nh 1328 >>> Jun 4 13:07:22.954372 l3nh_fdb_notify: FDB CHANGE vlan <sbc-core> mac >>> 00:08:25:fa:3c:82 >>> Jun 4 13:21:18.041160 Attempt to add vlan sbc-core mac 00:08:25:fa:3c:82, >>> ifname ge-0/0/5.0, pnac_status 0, 0 >>> Jun 4 13:21:18.041271 vlan sbc-core mac 00:08:25:fa:3c:82 (tag 40), iif = >>> ge-0/0/5.0: present in FDB >>> Jun 4 13:21:18.041332 (3, 00:08:25:fa:3c:82) next-hop index change [1328 >>> -> 1327] >>> Jun 4 13:21:18.041670 Attempt to add vlan sbc-core mac 00:08:25:fa:3c:82, >>> ifname ge-0/0/6.0, pnac_status 0, 0 >>> Jun 4 13:21:18.041767 vlan sbc-core mac 00:08:25:fa:3c:82 (tag 40), iif = >>> ge-0/0/6.0: present in FDB >>> Jun 4 13:21:18.041807 (3, 00:08:25:fa:3c:82) next-hop index change [1327 >>> -> 1328] >>> Jun 4 13:21:18.041962 KRT enqueue FDB (3, 00:08:25:fa:3c:82) nh-index 1328 >>> >>> It looks to me like the MAC address is jumping around. What do you think? >>> >>> Thanks, >>> John >> _______________________________________________ >> juniper-nsp mailing list [email protected] >> https://puck.nether.net/mailman/listinfo/juniper-nsp > _______________________________________________ > juniper-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
