Re: Getting failover: link startup timeout

you might need to use a different port for the second failover group because the primary and secondary roles are different.

The primary and secondary designation doesn't cause much difference in load and it is usual to make one node primary for all failover subnets.

regards,

Glenn

On 15 Jun 2023 10:54 pm, Kraishak Mahtha <[email protected]> wrote:

Hi All,
I am using the ISC dhcp failover and I am getting continuous failover: link startup timeout error on both the appliances, not sure what is the issue, I checked the following

1)port 647(my failover) is open and I can see the tcpdump traffic between both servers

2)ntp is in sync

3)Both are able to ping each other

but here I have a bit of a different use case, for some of the subnets I assigned Server A as primary, and for other subnets, I assigned Server B as primary.

Server A-- Server B --> Failover f1

Server B --Server A --> Failover f2

Now let's say I have 10 subnets, so for the first 5, I used f1 as a failover peer, and for the other 5 subnets I used f2 as a failover peer. so basically in a single server config, we will have two failover peers in the first section of config server A will be declared as primary, and in the second section it will declare as failover like

failover peer "peer-1" {
primary;
address 10.1.10.246;
port 647;
peer address 10.1.10.247;
peer port 647;
max-response-delay 30;
max-unacked-updates 30;
load balance max seconds 3;
mclt 1800;
split 128;
}

failover peer "peer-2" {
secondary;
address 10.1.10.246;
port 647;
peer address 10.1.10.247;
peer port 647;
max-response-delay 30;
max-unacked-updates 30;
load balance max seconds 3;
}

Apart from this, the other config is a normal one with few subnets and basic options.

I think the above config is valid only because nowhere it gave the syntax error at compile time and also at run time and dhcpd is up and running, but the failover peer states

for f1 --> it is showing normal-normal but for f2 --> it is showing recover and unknown-state and sometimes it is showing partner-down and shutdown

I have a doubt

Can we configure the same server as the primary for f1 and failover for f2 for another failover peer? I hope that is a valid one because nowhere do I see the docs saying that is valid (in my Google search)

Can someone who has familiar with such setups and face similar issue can guide me

Thanks in Advance

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