Odd behaviour on em0 device in -stable ... I think ...

[Marc G. Fournier]

Just a quick follow up note on this ... this morning, we upgraded the
server in question to latest stable, and rebooted, to see if that would
clear up the problem ...

The problem persisted, but, based on comments about auto-negotiation made
in this thread, I figured I'd see if maybe 'forcing' to 'media 100baseTX
mediaopt full-duplex' would make any difference, and it appears to ... I
can now move IPs back and forth from server to server, including this one,
without any apparently problems ...

So, problem with aliasing/unaliasing code where autoselect is enabled,
maybe?

On Sun, 4 Jan 2004, Marc G. Fournier wrote:

>
> I'm having some odd behaviour with one of my servers ... it is the only
> one of 4 that I have that has an em device, and, from what I can tell, the
> problem doesn't exist on any of the other 3 ...
>
> The problem is that I want to move an IP from one of the other servers
> (all with fxp interfaces) over to the 4th, with the em device ... I -alias
> the IP from the fxp device, and alias it over to the em device, and I can
> no longer access it remotely ...
>
> If I alias it onto any of hte other two fxp based servers, it works fine.
>
> If I ping from the old server, on the same network, it pings fine ... its
> only remote pings that don't work ... and all other IPs currently on the
> em server are pingable too, so its not like I have ICMP blocked at any one
> point ...
>
> All 4 servers are plug'd into a Linksys 10/100 Switch, which is then
> plug'd into a Cisco Switch ...
>
> If I add an unused IP to the em device, it is pingable ... its as if
> somewhere isn't seeing the routing change from the old fxp based server
> over to the new em based one, but if I put it onto a different fxp based
> server, it works ...
>
> Trying to do a 'ping -S <IP> ns.uunet.ca' doesn't work either, but using
> an existing, pingable IP, does ... netmask is set identical to all the
> other IPs on the machine, and arp -a shows the IP as 'permanent' ...
>
> I'm not sure what to look at ... the only 'odd man out' here is the em
> device itself, but by the fact that I can add an unassigned IP to it, I'm
> not hitting a limit on # of aliased IPs (currently only 21) ... and I've
> tried with another assigned IP (unalias from fxp device, move it to em
> device) and it too becomes unpingable, but works fine if I move it to
> another fxp device on a different server ...
>
> Am I missing something obvious here?
>
> Thanks ...
>
>
> ----
> Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
> Email: scrappy at hub.org           Yahoo!: yscrappy              ICQ: 7615664
>

----
Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
Email: scrappy at hub.org           Yahoo!: yscrappy              ICQ: 7615664