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Router missing connected route after enabling BGP

tkatsiaounis
Level 1
Level 1

I have a router (Cisco 3845 with 1GB of memory and running IOS 12.4.24-T7 Advanced IP Services) on which i am trying to implement a bgp session with my ISP. My router has the three following interfaces

int g0/0 -> 26.30.80.92 (ISP side)

int g0/1 -> 94.132.32.120 (Static 16-IP block from ISP where my services reside)

int g1/0 -> 192.168.1.0 (Internal block for iBGP and OSPF)

 

My BGP config

router bgp 60
 no synchronization
 bgp log-neighbor-changes
 neighbor 26.30.80.110 remote-as 134
 neighbor 26.30.80.110 password 7 XXXXXXXXXXXXXX
 neighbor 26.30.80.110 ebgp-multihop 6
 no auto-summary

 

 

When i enable BGP the router downloads all routes from the ISP router (which is NOT 26.30.80.92 but another router 26.30.80.110) and everything seems to be working fine up to  a point when i cannot connect to anything in my 94.132.32.120 block. Strangely enough i can ping the router interface IP of this block but nothing further inside.

 

When i do a sh ip route 94.132.32.120 it returns as connected but still i cannot ping from outside. From the router i can ping the internal block IP's.

 

If i do a traceroute from outside to an ip of the block it stops at 94.132.32.121 (the router IP ) and then shows the router IP three times and then stars.

 

Does any body have any idea what might be the issue???

 

I thought about ISP problem with the specific block but although i got my own IP block  we have services that must still work with the ISP 16 block for the time being.

 

Thanks a lot in advance for any help/.

15 Replies 15

tkatsiaounis
Level 1
Level 1

I tried everything. I talked to the ISP, i changed the mem modules, i changed a router (swapped for another 3845), as it seems good old CPU of 3845 is too small to handle modern BGP issues (or is faulty). Since the router is EoL  i'll solve my issues with an ASR1001.

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