[j-nsp] JNCIP EBGP Case Study...

[Felix Schueren]

Hoogen,

>>     Okay.. Earlier task required while accepting routes from peer to tag
>>     them with a community and prepend them with as number 65412 twice...
>>     I notice that when I deactivate that.. It works.. So obviously R3 is
>>     considering the routes received from R1 with prepend of 65412 for
>>     all P1 routes to be some sort of as loop... So I guess there is
>>     something wrong about it..
>> 
>>     Page 568 of the JNCIP books... 
>> 
 > I guess for the solution to work we need to have
 >
 > autonomous-system 65001 loops 3;
 >
 > This would make sure we get those routes.
 >
it would, but I don't remember having to set as-loops when I worked 
through the JNCIP book. And I double-checked your initial email to find 
you might have a typo:

lab at R1# run show route advertising-protocol bgp 10.0.3.3
 >>
 >> inet.0: 65 destinations, 69 routes (63 active, 0 holddown, 4 hidden)
 >>   Prefix                  Nexthop              MED     Lclpref    AS 
path
 >> * 3.4.0.0/20              10.0.5.254                   100        65412
 >> 65412 1492 I


You prepend 65412 65412, where it should be 64512 64512

There's also a typo in at least r1 & r3 configs:
confederation 65412 members [ 65000 65001 65002 ];

your problems may be coming from those typos - if you consistently 
mistyped 64512 through your whole setup, it's probably ok, but I'd 
double-check all routers.

Note that stuff like this will mess you up badly in the actual lab - 
double-check every number you type, it saves time in the long run :)

Kind regards,

Felix


-- 
Felix Schüren
Head of Network

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