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BGP Route

Hello Experts,

 

I have an query for the below. Please correct me if I am wrong and provide me an solution.

 

When I had given an command :  show running-config | sec bgp,  the output shows as follows:

 

(Taken one network segment for sample)

 

address-family ipv4
network 10.180.0.0 mask 255.255.0.0

 

Questions:

1. As per the BGP theory any route advertised locally it need to be routing table as below:

 

Network Next Hop Metric LocPrf Weight Path
*> 10.180.0.0/16 0.0.0.0(local route).

 

But when I given the command: sh ip bgp | i 10.180.0.0 in router it show the output as below:

*> 10.180.0.0/16 10.242.31.129 0 32768 i

 

sh ip bgp 10.180.0.0
BGP routing table entry for 10.180.0.0/16, version 3532426
Paths: (1 available, best #1, table default)
Advertised to update-groups:
879 890
Refresh Epoch 1
Local
10.242.31.129 from 0.0.0.0 (10.242.0.88)
Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best
rx pathid: 0, tx pathid: 0x0

 

 

2. Could you please conform why the next hop is showing as different, even though it was advertised locally in my router.

 

Regards,

Sathish

3 Replies 3

Jon Marshall
Hall of Fame
Hall of Fame

 

Can you post the output of - 

 

sh ip ro 10.180.0.0 255.255.0.0

 

Jon

Hi Jon,

 

Please find the output:

 

sh ip route 10.180.0.0 255.255.0.0
Routing entry for 10.180.0.0/16
Known via "static", distance 1, metric 0
Advertised by bgp 65535
Routing Descriptor Blocks:
* 10.242.31.129
Route metric is 0, traffic share count is 1

 

 

sh ip bgp 10.180.0.0
BGP routing table entry for 10.180.0.0/16, version 3532426
Paths: (1 available, best #1, table default)
Advertised to update-groups:
879 890
Refresh Epoch 1
Local
10.242.31.129 from 0.0.0.0 (10.242.0.88)
Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best
rx pathid: 0, tx pathid: 0x0

Hello,

If this is not directly connected, it will not appear as you need.
Jaderson Pessoa
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