Re: strange csc behaviour// ip expert lab 9

:)
Thank you Bryan !!
That was the issue indeed.

br,
Ovidiu
#18857 RS

On Sun, Sep 12, 2010 at 12:10 AM, Bryan <deadheadblues_at_gmail.com> wrote:
> I think I remember a bug that caused this behavior. Something to do with the
> lfib and the directly connected network. A label is getting installed when
> it shouldn't. Traceroute to r2 and see if you get a loop. if I remember
> correctly the ldp session would also flap. Also check the lfib for
> peculiarities. I think to fix it I created a label filter for the directly
> connected prefix.
>
> On Sep 11, 2010 4:19 PM, "Ovidiu Neghina" <o.neghina_at_gmail.com> wrote:
>> Hi
>> I am doing lab9 of IP Expert were with we have a CSC scenario
>> Troubled topology is simple
>> R6------R2
>>
>> R6 has vrf with mpls ip activated towards R2,
>> ospf running between those two routers
>> I have direct connectivty between them. OSPF is up and running.
>> After I activate mpls ip on the link on both routers I loose direct
>> connectivity between them
>> I mean ping on directly connected ip address does not work anymore !!!
>> OSPF stays up.
>> LDP is also fliping a lot:
>> I did quite a few of CSC scenarios and this is the first time is
>> happening.
>>
>>
>> R2(config-subif)#do sh run int ser 4/0.206
>> interface Serial4/0.206 point-to-point
>> bandwidth 2000
>> ip address 123.2.6.2 255.255.255.0
>> mpls ldp discovery transport-address interface
>> mpls label protocol ldp
>> mpls ip
>> no cdp enable
>> frame-relay interface-dlci 206
>> end
>>
>> R6(config-subif)#do sh run int ser 4/0.602
>> interface Serial4/0.602 point-to-point
>> bandwidth 2000
>> ip vrf forwarding VPNA
>> ip address 123.2.6.6 255.255.255.0
>> mpls ldp discovery transport-address interface
>> mpls label protocol ldp
>> mpls ip
>> no cdp enable
>> frame-relay interface-dlci 602
>> end
>> I am doing it on dynamips. I did reboot both routers.
>> R6(config-subif)#do sh ver | i IOS
>> Cisco IOS Software, 7200 Software (C7200-K91P-M), Version 12.2(25)S14,
>> RELEASE SOFTWARE (fc2)
>> R6(config-subif)#
>> R2(config-subif)#do sh ver | i IOS
>> Cisco IOS Software, 7200 Software (C7200-K91P-M), Version 12.2(25)S14,
>> RELEASE SOFTWARE (fc2)
>> R2(config-subif)#
>>
>> Any hint is appreciated.
>> br
>> Ovidiu
>> #18857 RS
>>
>>
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Received on Sun Sep 12 2010 - 09:03:05 ART