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Beginner

show ip bgp <ip>

 

Hi,

 

based  on the output:

 

E3#show  ip  bgp 181.0.0.0/8
BGP routing table entry for 181.0.0.0/8, version 5
Paths: (1 available, best #1, table default)
  Not advertised to any peer
  Refresh Epoch 1
  1 2
    10.100.1.1 from 2.3.4.5 (11.11.11.11)
      Origin IGP, metric 0, localpref 100, valid, internal, best
      rx pathid: 0, tx pathid: 0x0

 

can somebody  explain me:

 

  • Refresh Epoch 1
  • 10.100.1.1 from 2.3.4.5 (11.11.11.11)

 

2.3.4.5 seems to be the  neighbor IP Address, 11.11.11.11 is the router-id of the neigbor. 

What  is  10.100.1.1 ?

 

Thanks in Advance!

Best regards

1 ACCEPTED SOLUTION

Accepted Solutions
Highlighted
Cisco Employee

Refresh Epoch 1: As the routing protocols start to repopulate the RIB on a prefix-by-prefix basis, the updates in turn cause prefix-by-prefix updates for CEF, which it uses to update the FIB and adjacency databases. Existing and new entries will receive the new version (epoch) number, indicating that they have been refreshed.

"Epoch refers to the period of time"

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/irg-adv-features.html

 

To answer your 2nd question, 10.100.1.1 is the next hop value. This field will be set to 0.0.0.0 if the prefix is locally originated (for example advertising a loopback address using network statement)

Hope this clarifies

Thanks
--Vinit

View solution in original post

2 REPLIES 2
Highlighted
Cisco Employee

Refresh Epoch 1: As the routing protocols start to repopulate the RIB on a prefix-by-prefix basis, the updates in turn cause prefix-by-prefix updates for CEF, which it uses to update the FIB and adjacency databases. Existing and new entries will receive the new version (epoch) number, indicating that they have been refreshed.

"Epoch refers to the period of time"

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/irg-adv-features.html

 

To answer your 2nd question, 10.100.1.1 is the next hop value. This field will be set to 0.0.0.0 if the prefix is locally originated (for example advertising a loopback address using network statement)

Hope this clarifies

Thanks
--Vinit

View solution in original post

Highlighted

Hi As you mentioned 

     That is the IP address of IBGP neighbor Peer IP address " 10.100.1.1"   

E3#show  ip  bgp 181.0.0.0/8
BGP routing table entry for 181.0.0.0/8, version 5
Paths: (1 available, best #1, table default)
  Not advertised to any peer
  Refresh Epoch 1
  1 2
    10.100.1.1 from 2.3.4.5 (11.11.11.11)
      Origin IGP, metric 0, localpref 100, valid, internal, best
      rx pathid: 0, tx pathid: 0x0