cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
522
Views
0
Helpful
9
Replies

BGP Route Reflector Client not advertising all routes ti RR Server

kristiqirjako99
Beginner
Beginner

Hello,

I am having a problem with BGP route reflector client. The topology is attached. So, R7 which is a route reflector client doesn't advertise all routes to R6, more specifically the routes of AS100 are not advertised.

Anyway, if I shut down the link between AS200 and AS100, R7 advertises those routes. Is there a solution, to have all routes advertised, am I missing something in configuration or?

 

Thanks in advance!

1 Accepted Solution

Accepted Solutions

What is alternative here ? Path from as100-as300 then to R7?

If it then no' bgp select only one path best by defualt 

But you can make R7 select two path if you use multipath with as relax.

Here R7 will use two path one from RR (As100) and other from as300-as100.

View solution in original post

9 Replies 9

Can I see 

Show ip  bgp

in RR and R5 and R7

kristiqirjako99
Beginner
Beginner
R7#show ip bgp all
For address family: IPv4 Unicast

BGP table version is 47, local router ID is 17.0.0.7
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

Network Next Hop Metric LocPrf Weight Path
*>i 10.0.0.0/24 14.0.0.2 0 100 0 100 i
* 17.0.0.8 0 300 100 i
*>i 11.0.0.0/24 14.0.0.2 0 100 0 100 i
* 17.0.0.8 0 300 100 i
*>i 12.0.0.0/24 14.0.0.2 0 100 0 100 i
* 17.0.0.8 0 300 100 i
*>i 13.0.0.0/24 14.0.0.2 0 100 0 100 i
* 17.0.0.8 0 300 100 i
*>i 14.0.0.0/24 15.0.0.5 0 100 0 i
* 17.0.0.8 0 300 100 i
*>i 15.0.0.0/24 16.0.0.6 0 100 0 i
*> 16.0.0.0/24 0.0.0.0 0 32768 i
* i 16.0.0.6 0 100 0 i
* 17.0.0.0/24 17.0.0.8 0 0 300 i
Network Next Hop Metric LocPrf Weight Path
*> 0.0.0.0 0 32768 i
* i 19.0.0.0/24 14.0.0.2 0 100 0 100 i
*> 17.0.0.8 0 0 300 i

For address family: IPv4 Multicast

For address family: MVPNv4 Unicast

From this I see best prefix from as100 not from as300.

So, it doesn't even accept the alternative BGP routes in the BGP database?

What is alternative here ? Path from as100-as300 then to R7?

If it then no' bgp select only one path best by defualt 

But you can make R7 select two path if you use multipath with as relax.

Here R7 will use two path one from RR (As100) and other from as300-as100.

Thank you very much!

You are so welcome 

kristiqirjako99
Beginner
Beginner
R5#show ip bgp all
For address family: IPv4 Unicast

BGP table version is 67, local router ID is 15.0.0.5
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

Network Next Hop Metric LocPrf Weight Path
*> 10.0.0.0/24 14.0.0.2 0 0 100 i
*> 11.0.0.0/24 14.0.0.2 0 0 100 i
*> 12.0.0.0/24 14.0.0.2 0 100 i
*> 13.0.0.0/24 14.0.0.2 0 100 i
* 14.0.0.0/24 14.0.0.2 0 0 100 i
*> 0.0.0.0 0 32768 i
* i 15.0.0.0/24 15.0.0.6 0 100 0 i
*> 0.0.0.0 0 32768 i
*>i 16.0.0.0/24 15.0.0.6 0 100 0 i
*>i 17.0.0.0/24 16.0.0.7 0 100 0 i
*> 19.0.0.0/24 14.0.0.2 0 100 i

For address family: IPv4 Multicast

For address family: MVPNv4 Unicast


kristiqirjako99
Beginner
Beginner

R6#show ip bgp all
For address family: IPv4 Unicast

BGP table version is 62, local router ID is 16.0.0.6
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

Network Next Hop Metric LocPrf Weight Path
*>i 10.0.0.0/24 14.0.0.2 0 100 0 100 i
*>i 11.0.0.0/24 14.0.0.2 0 100 0 100 i
*>i 12.0.0.0/24 14.0.0.2 0 100 0 100 i
*>i 13.0.0.0/24 14.0.0.2 0 100 0 100 i
*>i 14.0.0.0/24 15.0.0.5 0 100 0 i
* i 15.0.0.0/24 15.0.0.5 0 100 0 i
*> 0.0.0.0 0 32768 i
* i 16.0.0.0/24 16.0.0.7 0 100 0 i
*> 0.0.0.0 0 32768 i
*>i 17.0.0.0/24 16.0.0.7 0 100 0 i
*>i 19.0.0.0/24 14.0.0.2 0 100 0 100 i
* i 17.0.0.8 0 100 0 300 i

For address family: IPv4 Multicast

For address family: MVPNv4 Unicast

R6#
Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: