[c-nsp] bgp weird issue

mm-tech mm at math.pub.ro
Mon Dec 1 03:34:11 EST 2008


> Hello John:
>
>
> On 11/30/08 10:32 AM, "mm-tech" <mm at math.pub.ro> wrote:
>
> <snip>
>
>> The issue is after I configure the iBGP relationship between Router1 and
>> Router2: connectivity to the 62.217.X.X/29 subnet on Router1 is lost. It
>> cannot be pinged anymore from outside. The 91.195.X.X/23 is announced
>> correctly through both ISPs and any IP in this /23 subnet is pingable
>> from
>> outside. They only problem is with the 62.217.X.X/29 block that becomes
>> unreachable after configuring the iBGP relationship and I don't
>> understand
>> why this is happening.
>>
>> Sorry for the long post and I hope you'll give me some hints -:)
>>
>> Thanks,
>> John
>>
>
> How is the /29 configured on router 1?  If it's being statically routed
> from
> your ISP, then you need to have it in your IGP somehow.  Something simple
> would be:
>
> Interface x/x
> Ip address 62.217.x.x 255.255.255.248
>
> Router ospf 10
> Redistribute connected subnets
>
> More information is needed, I'm afraid.
>
> Regards,
>
> Mike
>
>
Yes, the /29 subnet is configured on Router1 on a SVI interface. I haven't
tried to put this /29 into my IGP. I'll try that and I'll let you know
guys.

Iy you need more info, please let me know...

Thanks,
john



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