Neighbor adjacency flaps at the same time on all routers

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RR_Cluster
Posts: 8
Joined: Sat Sep 09, 2017 11:46 pm

Neighbor adjacency flaps at the same time on all routers

Post by RR_Cluster » Sat Sep 22, 2018 6:33 pm

Hello,

I've been using EVE the community edition for a while now. I have it deployed on my windows laptop and on my windows desktop running vmware workstation. I've noticed since I upgraded to 2.0.3-92 that all neighbor adjacencies bounce at the same time in a large topology. This happens with directly connected routers and with switches in between. This is across the board with EIGRP, OSPF, and LDP. BGP is stable but I believe that is because of it using TCP. The adjacency is down for milliseconds, but it's just annoying because I can't tell if it's my configuration or if it's EVE. This happens to all routers running the dynamic protocol at the same time in the topology.

The weird thing is, on my laptop I experience no such issues and that is also running 2.0.3-92. Here's the hardware differences between my desktop and laptop.

Laptop:
VMware workstation 12 Player
i7 4 core
16GBs of RAM

Desktop
VMware workstation 12 pro
AMD FX 8 core
24GBs of RAM

I adjusted the dead timer intervals to 90 seconds and the issue still persists. From my perspective, pre 2.0.3-92 this issue didn't exist. So is there anything that changed between the version pre 2.0.3-92 that could cause this? Let me know if there is more information I can get to help narrow this down.

Thanks

Uldis (UD)
Posts: 5180
Joined: Wed Mar 15, 2017 4:44 pm
Location: London
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Re: Neighbor adjacency flaps at the same time on all routers

Post by Uldis (UD) » Sat Sep 22, 2018 9:04 pm

AMD is not the best choice and have issues... iwth EVE due to lack of Intel VT-X/EPT options
What are routers used in topology?

UD

RR_Cluster
Posts: 8
Joined: Sat Sep 09, 2017 11:46 pm

Re: Neighbor adjacency flaps at the same time on all routers

Post by RR_Cluster » Sat Sep 22, 2018 11:16 pm

I go between L3-ADVENTERPRISEK9-M-15.4-2 and i86bi-linux-l3-adventerprisek9-15.3. Both are stable on my laptop but have the neighbor flapping issues on my desktop. Even with the pro version, do you think the results would be the same since my processor is AMD?

Uldis (UD)
Posts: 5180
Joined: Wed Mar 15, 2017 4:44 pm
Location: London
Contact:

Re: Neighbor adjacency flaps at the same time on all routers

Post by Uldis (UD) » Sun Sep 23, 2018 7:16 am

Yes mate, AMD is that bad part here unfortunately....
http://www.eve-ng.net/documentation/ins ... equirement
It is capable if EVE is installed directly on box, Linux/EVE, but due to issues with VM ware and AMD we do not support it...

Uldis

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