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Cc: freebsd general questions <freebsd-questions@freebsd.org>
Subject: Re: carp and duplicated echo replies
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gahn wrote:
> My two servers have carp configured and work fine. but the pings directed to the virtual interface (carp interface for both server) result duplicated replies:
>
> 64 bytes from 172.20.1.25: icmp_seq=0 ttl=64 time=0.049 ms
> 64 bytes from 172.20.1.25: icmp_seq=1 ttl=64 time=0.016 ms (DUP!)
> 64 bytes from 172.20.1.25: icmp_seq=2 ttl=64 time=0.020 ms
> 64 bytes from 172.20.1.25: icmp_seq=3 ttl=64 time=0.035 ms (DUP!)
> 64 bytes from 172.20.1.25: icmp_seq=4 ttl=64 time=0.016 ms
> 64 bytes from 172.20.1.25: icmp_seq=5 ttl=64 time=0.015 ms (DUP!)
> 64 bytes from 172.20.1.25: icmp_seq=6 ttl=64 time=0.014 ms
> 64 bytes from 172.20.1.25: icmp_seq=7 ttl=64 time=0.014 ms (DUP!)
> ...
>
> Is that normal? VRRP virtual interface don't seem to behave that way.
>   
No, that's not normal.  Are you sure that you specified different 
advskews for the carp interfaces on both servers?  Do the interfaces 
both display that they are in MASTER status, or is one in BACKUP mode?