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IP adresses moving continuously between routers (VRRP) #215

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runborg opened this issue Apr 20, 2024 · 4 comments · May be fixed by #390
Open

IP adresses moving continuously between routers (VRRP) #215

runborg opened this issue Apr 20, 2024 · 4 comments · May be fixed by #390
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@runborg
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runborg commented Apr 20, 2024

VRRP and EVPN Virtual Gateway are features used while creating mult-router local gateway redundancy on a single "LAN",
The shared ip address used on this gateway pair is then owned by all the routers in the pair.
In the current implementation of new zino2, these adresses will move between the routers each time a router is "rediscovered"
In normal circumstances a router will never source any traffic from this virtual ip address
An example of this is following under here:

(Anonymized data)
--> $ cat log | grep -i "home of" | cut -c 66- | sort | uniq -c
    336 Home of 10.0.254.10 changed from router-gw1 to router-gw2
    335 Home of 10.0.254.10 changed from router-gw2 to router-gw1
    336 Home of 10.0.254.114 changed from router-gw1 to router-gw2
    335 Home of 10.0.254.114 changed from router-gw2 to router-gw1
    885 Home of 10.0.254.138 changed from router-gw1 to router-gw2
    886 Home of 10.0.254.138 changed from router-gw2 to router-gw1
    370 Home of 10.0.254.179 changed from router-gw1 to router-gw2
    371 Home of 10.0.254.179 changed from router-gw2 to router-gw1

Is it possible to ignore these "virtual" ip adresses, or allow them to exist on both routers at the same time?

(This is just one of several reasons for these type of messages in our network, and i'm investigating more instances of it)

@lunkwill42
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How does this work under Zino 1?

@he32
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he32 commented Sep 3, 2024

This basically works the same in Zino 1. Some reasons this may appear:

  • Use of VRRP. The logging was added before that became prevalent in our network.
  • Use of pre-configured routers, which end up being connected & monitored, this will also give rise to "duplicate use of IP address".

Therefore, the usefullness of these logs have deteriorated over time, and should probably be removed.

@lunkwill42
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Therefore, the usefullness of these logs have deteriorated over time, and should probably be removed.

We could keep the log message, but change the level to debug, @he32 ?

@he32
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he32 commented Sep 4, 2024

We could keep the log message, but change the level to debug, @he32 ?

That works as well.

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