-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi list,
once again I had a strange occurrence with one EX420048T switch running JUNOS 9.3R2.8. Several VLANs and layer3 routing are confi- gured on it. The symptom was that directly connected (access-) VLANs x and y couldn't talk to an address range, which is routed through a trunk to VLAN x's IP on another switch. Mind you, there is nothing fancy configured on the switches and they're not bogged down to their knees. Perhaps it's an interoper- ability problem but I wouldn't know that. All this is basic functionality that tends to go haywire though, preferably when people are busy not being awake. Things happened without any human intervention or after recent configuration changes. This time, the logs actually provided something which I can't make heads or tails from the logs so here goes: - ---8<--- Jan 30 22:26:33 some.switch fpc0 Resolve request came for an address matching on Wrong nh nh:1317, type:Unicast...? Jan 30 22:26:45 some.switch last message repeated 8 times Jan 30 22:28:45 some.switch last message repeated 167 times Jan 30 22:38:46 some.switch last message repeated 913 times Jan 30 22:48:44 some.switch last message repeated 713 times Jan 30 22:55:02 some.switch last message repeated 262 times Jan 30 22:55:30 some.switch fpc0 Resolve request came for an address matching on Wrong nh nh:1317, type:Unicast...? Jan 30 22:55:45 some.switch last message repeated 7 times Jan 30 22:57:46 some.switch last message repeated 179 times - --->8--- The MAC and ARP table at that time looked just fine and I doubt it's related to the spanning-tree, since so far it's a dual star topology without any loops. Neither restarting the switching nor rou- ting daemon helped anything; a complete reboot of the switch did the trick. Perhaps this is of interest to Juniper, I don't really expect any help with it. Maybe one of the future JUNOS releases will remedy that. Nonetheless, I'm kind of disappointed with those switches. This isn't the first time they spat out mysterious behavior to basic functions (MAC learning, populating the ARP table). I ranted on the j-nsp mailinglist about this earlier and apparently I'm not the only one having these issues. Someone from Hosteurope confirmed having similar problems. A couple of cheap HP procurve 3400cl-24G switches using the preinstalled firmware worked for about 3 years in the same scenario and did not need to be re- started even once. After replacing them with the EX-series things started to, well, behave irrationally. I truly hope that Juniper is going to put some extra effort into bugfixing their EX-series. I really like the usability of JUNOS and would look forward to replacing more of our legacy switching equipment with the EX-series. Being aware that switching is a relatively new field in the portfolio of Juniper, I acknowledge that stuff like this is likely to happen to the early adopters. Still, it leaves some sort of bad aftertaste if the basics are prone to being flaky. Or it's just me again... For some reason unbeknownst to me, I tend to stumble across bugs more often than other people ;) If the lurking devs or SE's from Juniper could provide some debugging mechanisms so that useful information could be gather- ed for you folks, I am all ears (yes, the hardware sports an active support contract). Thanks for enduring my ramblings. Best regards, Mit freundlichen Gruessen, i. A. Sven Juergensen - -- Fachbereich Netze/Projekte KielNET GmbH Gesellschaft fuer Kommunikation Preusserstr. 1-9, 24105 Kiel Telefon : 0431 2219-053 Mobil : 0170 403 5600 Telefax : 0431 2219-005 E-Mail : s.juergen...@kielnet.de Internet: http://www.kielnet.de Geschaeftsfuehrer Eberhard Schmidt HRB 4499 (Amtsgericht Kiel) PGP at http://pgp.kielnet.de/sjuergensen/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) iEYEARECAAYFAkmGrNMACgkQnEU7erAt4TIQUwCg9FdkIaxPd9PDDA6l6lSqfNZ7 B1QAnjea4uZWW2pA3O2znhy0Vvph3xOU =sKyz -----END PGP SIGNATURE----- _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp