[FROG] MAC Flapping With VRRP on Linux

[Alasdair Muckart]

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Hi Quentin,

Thanks for that.

Here's the physicals, the bond and the VRRP int (the MACVLAN)

11: enp10s0f1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master bond0 state UP mode DEFAULT group default qlen 1000
    link/ether e2:39:b3:4e:bc:47 brd ff:ff:ff:ff:ff:ff permaddr 90:3c:b3:3f:da:18

13: enp11s0f1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master bond0 state UP mode DEFAULT group default qlen 1000
    link/ether e2:39:b3:4e:bc:47 brd ff:ff:ff:ff:ff:ff permaddr
    90:3c:b3:3f:da:1a

14: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
    link/ether e2:39:b3:4e:bc:47 brd ff:ff:ff:ff:ff:ff

23: vrrp4-1-1 at bond0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
    link/ether 00:00:5e:00:01:01 brd ff:ff:ff:ff:ff:ff


The solution for me looks like it was just setting these sysctls:
net.ipv4.conf.bond0.arp_ignore=1
net.ipv4.conf.vrrp4-1-1.arp_ignore=1

Cheers.

"Quentin Young" <qlyoung at qlyoung.net> writes:

> 1.  ( ) text/plain          (*) text/html           
>
> Can you share the output of `ip link show` on the device (just one of them is fine) exhibiting the arp behavior? I am especially interested in the macvlan
> devices.
>
> Quentin
>
> PS If you care to join our Slack, the higher bandwidth might prove more efficient for debugging. Whatever results of that conversation will be posted
> back to this list for posterity.
>
> On Sun, May 19, 2024, at 4:50 PM, Alasdair Muckart via frog wrote:
>
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> [4. text/plain]
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- -- 
Alasdair Muckart (he/him)
Network Infrastructure Architect
Catalyst.Net Limited - Expert Open Source Solutions

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