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Network disruption VSP8600

Network disruption VSP8600

BRMS
New Contributor II

I’m using 4 VSP8600 in a SPBM-Configuration. Today we experienced a network disruption although no configuration changes were made. The logs are full of these:

************************************************************************************
Command Execution Time: Tue Oct 06 11:26:49 2020 CEST
************************************************************************************
1 2020-10-06T11:24:33.770+02:00 kreuz IO4 - 0x00138537 - 0004e001 DYNAMIC CLEAR GlobalRouter COP-SW INFO VIST peer mac b4:2d:56:9c:7a:11 on VID 2422 is learnt on non-IST MltId-1, Pointing record back to IST port.Total Peer Mac Move Count: 8051
1 2020-10-06T11:24:30.533+02:00 kreuz IO2 - 0x00138537 - 0004e001 DYNAMIC CLEAR GlobalRouter COP-SW INFO VIST peer mac b4:2d:56:9c:7a:36 on VID 426 is learnt on non-IST MltId-1, Pointing record back to IST port.Total Peer Mac Move Count: 16644
1 2020-10-06T11:22:35.621+02:00 kreuz IO3 - 0x00138537 - 0004e001 DYNAMIC CLEAR GlobalRouter COP-SW INFO VIST peer mac b4:2d:56:9c:7a:2b on VID 419 is learnt on non-IST MltId-1, Pointing record back to IST port.Total Peer Mac Move Count: 13707

...

1 2020-10-06T10:42:31.049+02:00 kreuz IO5 - 0x00138537 - 0004e001 DYNAMIC CLEAR GlobalRouter COP-SW INFO VIST peer mac b4:2d:56:9c:7a:28 on VID 205 is learnt on non-IST MltId-1, Pointing record back to IST port.Total Peer Mac Move Count: 9389
1 2020-10-06T10:42:31.035+02:00 kreuz IO6 - 0x00138537 - 0004e001 DYNAMIC CLEAR GlobalRouter COP-SW INFO VIST peer mac b4:2d:56:9c:7a:28 on VID 205 is learnt on non-IST MltId-1, Pointing record back to IST port.Total Peer Mac Move Count: 631

...

1 2020-10-06T10:42:22.788+02:00 kreuz CP1 - 0x00004619 - 01900001 DYNAMIC CLEAR GlobalRouter SNMP INFO Smlt Link Up Trap(SmltId=133)
1 2020-10-06T10:42:22.788+02:00 kreuz CP1 - 0x0000000a - 01900001.133 DYNAMIC CLEAR GlobalRouter SW INFO SMLT 133 Link is UP
1 2020-10-06T10:42:17.262+02:00 kreuz CP1 - 0x0000461a - 01900001 DYNAMIC SET GlobalRouter SNMP INFO Smlt Link Down Trap(SmltId=133)
1 2020-10-06T10:42:17.261+02:00 kreuz CP1 - 0x00000009 - 01900001.133 DYNAMIC SET GlobalRouter SW INFO SMLT 133 Link is DOWN

...

1 2020-10-06T10:04:03.768+02:00 kreuz IO3 - 0x00138537 - 0004e001 DYNAMIC CLEAR GlobalRouter COP-SW INFO VIST peer mac b4:2d:56:9c:7a:2b on VID 419 is learnt on non-IST MltId-1, Pointing record back to IST port.Total Peer Mac Move Count: 12529
1 2020-10-06T10:03:48.600+02:00 kreuz IO4 - 0x00138537 - 0004e001 DYNAMIC CLEAR GlobalRouter COP-SW INFO VIST peer mac b4:2d:56:9c:7a:11 on VID 2422 is learnt on non-IST MltId-1, Pointing record back to IST port.Total Peer Mac Move Count: 7347

What could be the cause of this problem and how can i debug this any further? my log only goes back for ~1hr

1 ACCEPTED SOLUTION

Miguel-Angel_RO
Valued Contributor II

brms,

 

I see the following points to be worked out:

  • change the isis metrics of your isis interfaces: the MLT should have the cost of the interfaces 1/1 or 1/5 divided by 2.
    • If it is 10G links: MLT=100, interfaces 1/1,1/5 = 200
  • I would enable SLPP on all the C-VLANs
  • Could you confirm the value of the i-sid used on the different switches for the vIST?
    • It should be uniq per cluster
  • I would change the subnet to /30 but this shouldn’t cause any issue using a /24
  • avoid the redistribution of the vIST subnets in ISIS/OSPF/other: https://gtacknowledge.extremenetworks.com/pkb_mobile#article/How_To/kA12T0000004QhGSAU/s
  • Ensure that you don’t use the vIST subnet for other purposes than VIST (not as next hop, not as SNMP access, etc)

Mig

View solution in original post

17 REPLIES 17

BRMS
New Contributor II

I’ll ask our partner if they already opened a support case at extreme. As soon as i get the case number i’ll send it to you. Thanks again for all the help!

Roger_Lapuh
Extreme Employee

BRMS - can you please share your support case number that was opened for the MAC move issue? Please send it directly to me at rlapuh@extremenetworks.com

Thanks Roger

Miguel-Angel_RO
Valued Contributor II

brms,

As those operations are quite intrusive I would insist to have the support of the partner.

 

Cheers

 

Mig

BRMS
New Contributor II
  • change the isis metrics of your isis interfaces: the MLT should have the cost of the interfaces 1/1 or 1/5 divided by 2.
    • If it is 10G links: MLT=100, interfaces 1/1,1/5 = 200

 

atm all three are at a metric of 10. i should change the mlt-1 to 5 with the following command, right? can this be done without interrupting anything or do i need to disable isis first?

interface mlt 1
isis spbm 1 l1-metric 5

I would enable SLPP on all the C-VLANs

 

since the we don’t have a BEB/BCB configuration but the 4-VSP-Cores and directly connected EXOS-switches with fa and servers I’m not sure which SLPP method to use. do the cores count as access-smlt in my case? what would you recommend? SLPP per port or per VLAN?

 

Could you confirm the value of the i-sid used on the different switches for the vIST?

  • It should be uniq per cluster

vist-cluster 1 has vlanid 4053 and isid 104053

vist-cluster 2 has vlanid 4054 and isid 104054

 

I would change the subnet to /30 but this shouldn’t cause any issue using a /24

last time i changed the ip of the vist vlan the whole system crashed. as far as i remember i needed to disable isis before changing anything. what precautions do i need to take before changing the ip? is it enough to disable both ports belonging to mlt 1 before changing the ip?

 

avoid the redistribution of the vIST subnets in ISIS/OSPF/other: https://gtacknowledge.extremenetworks.com/pkb_mobile#article/How_To/kA12T0000004QhGSAU/s

wow, this looks rather unintuitiv. will give it a try

 

Ensure that you don’t use the vIST subnet for other purposes than VIST (not as next hop, not as SNMP access, etc)

as far as i know we don’t use the vist-ips anywhere but will check that.

 

Thank you very much for your help!

GTM-P2G8KFN