routing bpg and ospf

[mustafali-0522]

i have promblem with routing. so i have 3 AS that connected with bgp, and in their internal connection use ospf. so i want to connect AS1 to AS 3. but i dont how to do. i can connect AS1 TO AS2 and AS2 to AS3, im still confusing how to connect AS1 to AS3 via AS2

[Giuseppe Larosa]

Hello @mustafali-0522 ,

>> i can connect AS1 TO AS2 and AS2 to AS3

this is usually enough

in order to create eBGP sessions between devices that are not directly connected you need to increase the default TTL of 1 good for directly attached devices using neighbor x.x.x.x ebgp-multihop N

Warning : your AS1 to AS3 eBGP session actually will depend on AS2 and on the eBGP sessions AS1 to AS2, and AS2 to AS3. So there is little real value in adding the AS1 to AS3 eBGP session

Hope to help

Giuseppe

[MHM Cisco World]

No need connect' the AS2 will forward best path recive from AS1  to AS3.

No need this complex solution

MHM