Hi Pavel, not sure if it's related but is very interessting. I checked the mac learning log on several 4550 and found the learn/delete indicator minute by minute. I think we will increase the entry counts per index an look if something getting better (or worse).
Regards, Tim 2017-08-12 11:54 GMT+02:00 Pavel Lunin <[email protected]>: > > > Not sure this is specifically related to the OP but there is a known > hardware limitation/feature of some Broadcom chips used in many EX switches > of the previous generations (including EX4500). They use a hash table to > reduce MAC lookup length, which was too small in some older JUNOS versions, > leading to hash-collisions and consequent mac learning failures in some > scenarios. > > Links, worth to check: > > https://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/mac-lookup-length-edit-ethernet-switching-options.html > https://forums.juniper.net/t5/Ethernet-Switching/EX4500-show-ethernet-switching-hash-collisions/td-p/204849 > https://yingsnotebook.wordpress.com/2017/03/20/mac-address-learning-problem-in-juniper-ex-switch/ > > > > > 2017-08-12 2:14 GMT+02:00 Aaron Gould <[email protected]>: >> >> Sorry to hear that. >> >> I may have mentioned previously to someone else on the list... my EX4550's >> are rock solid... over 4 years uptime... I run our mirrored/redundant data >> centers behind them (hp 3par, hypervisors, etc) and our internet cdn caches >> behind them too...(Akamai, netflix, and that other one) >> >> A pair of 4550's in top of racks virtual chassis'ed together >> >> Here they are... >> >> root@sabn-dcvc-4550> show system uptime | grep "up|fpc" >> fpc0: >> 7:07PM up 1516 days, 5:51, 0 users, load averages: 0.09, 0.11, 0.08 >> fpc1: >> 7:07PM up 1516 days, 5:51, 2 users, load averages: 0.22, 0.17, 0.16 >> >> >> root@stlr-dcvc-4550> show system uptime | grep "up|fpc" >> fpc0: >> 7:09PM up 1520 days, 4:21, 0 users, load averages: 0.11, 0.15, 0.14 >> fpc1: >> 7:09PM up 1520 days, 4:42, 1 user, load averages: 0.25, 0.22, 0.18 >> >> >> root@stlr-dcvc-4550> show version | grep "fpc|model|boot" >> fpc0: >> -------------------------------------------------------------------------- >> Model: ex4550-32f >> JUNOS Base OS boot [12.2R4.5] >> fpc1: >> -------------------------------------------------------------------------- >> Model: ex4550-32f >> JUNOS Base OS boot [12.2R4.5] >> >> ....run a bunch of vlans/stp... >> >> {master:1} >> root@stlr-dcvc-4550> show spanning-tree bridge brief | grep >> "protocol|Vlan" >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 12 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 1000 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 10 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 11 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 210 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 204 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 202 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 201 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 14 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 13 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 1006 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 101 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 921 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 2 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 2202 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 3 >> Enabled protocol : RSTP >> >> STP bridge parameters for VLAN 4 >> >> >> >> _______________________________________________ >> 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
