Re: L2 etherchannel interface tracking and shutdown

I know, but how about creating 2 SVI's with a /31 just for this
purpose :-)

--
Regards,
Rick Mur
CCIE2 #21946 (R&S / Service Provider)
Sr. Support Engineer  IPexpert, Inc.
URL: http://www.IPexpert.com
On 4 sep 2009, at 19:59, Radioactive Frog wrote:
> Thanks Rick
> humm...... IP SLA = Layer3
> i want layer2
>
>
> On Sat, Sep 5, 2009 at 2:59 AM, Rick Mur <rmur_at_ipexpert.com> wrote:
> I can't tell you if it's possible to do any kind of MAC
> reachability, as far as I can think of not.
> You could create a separate VLAN for this and send it over the trunk
> (assuming the port-channel is a trunk) and create IP SLA objects for
> this that ping the other end. As soon the other end is not
> reachable, the IP SLA fires a log message and based on that log
> message you could fire an EEM script, shutting down the port-channel
> for instance.
>
> I know it's a crappy solution, but it should work though :-)
>
>
> --
> Regards,
>
> Rick Mur
> CCIE2 #21946 (R&S / Service Provider)
> Sr. Support Engineer  IPexpert, Inc.
> URL: http://www.IPexpert.com
>
>
> On 4 sep 2009, at 15:18, Radioactive Frog wrote:
>
> oh I forgot to tell ya, link state tracking is not an option since
> there
> will be waste of bandwidth.
>
>
> On Fri, Sep 4, 2009 at 11:10 PM, Radioactive Frog
> <pbhatkoti_at_gmail.com>wrote:
>
> Gang,
> I have a scenario below - real life exp.
>
> sw1====ether-channel===SWX-DUMB-L2===========sw2
> Cisco                                Dumb-no brand
> Cisco
>
> Connections:
> sw1-port1: mac - aa-aa-aa-aa --- goes to --sw2-port1:mac - cc-cc-cc-cc
> sw1-port2:mac -  bb-bb-bb-bb --- goes to --sw2-port2:mac - dd-dd-dd-dd
>
> background:-
> Both are connected using L2 ether-channels. My port channel is up and
> running between sw1 and sw2 (yes having swX in middle, it works).
> Everything
> working fine. Dumb switch doesn't support anything e.g. UDLD.
>
> Problem: when i disconnect port 2 of sw1, it doesn't gets disconnected
> (error-state) at sw2. Of course the reason being a Dumb switch in
> middle.
> Now many of you'd think it doesn't work but its working and I have a
> few
> field application running in the same scenario in production.
>
> Problam: When I disconnect a cable from port#1 - traffic flow
> through the
> other port e.g. port#2, no problem. but when I unplug cable from
> port#2 it
> times out and i can see port-channel is still up. of course its the
> UDLD
> which suppose to shutdown the port to other end to make it work but
> dumb sw
> doesn't support UDLD.
>
> Now my real qustion is:
> Is it possible to configure IPSLA type of things based on MAC/Layer2
> ping
> based to track far end MAC and if its not reacheable via that
> interface it
> shut it down.
> I can do this using TCL script and EEM on Layer3 port-channeling (IP
> layer)
> but don't know how to do it on MAC layer.
> so, the situation is if port#2 is down on Sw1 , sw2 shud ping mac
> cc-cc-cc-cc via its port#2 and if it pings do nothing else shutdown
> the self
> port.
>
> Kind of layer2 SLA on etherchannel
>
> Thankx in advance.
>
> frog
>
>
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