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
