Dell Configuration Guide for the S4048–ON System 9.14.2.4

Examples of Verifying BGP Information

The following example shows verifying a BGP configuration.

R2# show running-config bgp
!
router bgp 2
   neighbor 1.1.1.2 remote-as 1
   neighbor 1.1.1.2 no shutdown
   neighbor 2.2.2.2 remote-as 1
   neighbor 2.2.2.2 no shutdown
   neighbor 3.3.3.2 remote-as 1
   neighbor 3.3.3.2 no shutdown
   bfd all-neighbors

The following example shows viewing all BFD neighbors.

R2# show bfd neighbors

*     - Active session role
Ad Dn - Admin Down
B     - BGP
C     - CLI
I     - ISIS
O     - OSPF
R     - Static Route (RTM)
M     - MPLS
V     - VRRP

LocalAddr  RemoteAddr Interface State Rx-int Tx-int Mult Clients
* 1.1.1.3  1.1.1.2    Te 6/1    Up    200    200    3    B
* 2.2.2.3  2.2.2.2    Te 6/2    Up    200    200    3    B
* 3.3.3.3  3.3.3.2    Te 6/3    Up    200    200    3    B

The following example shows viewing BFD neighbors with full detail.

The bold lines show the BFD session parameters: TX (packet transmission), RX (packet reception), and multiplier (maximum number of missed packets).

R2# show bfd neighbors detail

Session Discriminator: 9
Neighbor Discriminator: 10
Local Addr: 1.1.1.3
Local MAC Addr: 00:01:e8:66:da:33
Remote Addr: 1.1.1.2
Remote MAC Addr: 00:01:e8:8a:da:7b
Int: TenGigabitEthernet 6/1
State: Up
Configured parameters:
TX: 200ms, RX: 200ms, Multiplier: 3
Neighbor parameters:
TX: 200ms, RX: 200ms, Multiplier: 3
Actual parameters:
TX: 200ms, RX: 200ms, Multiplier: 3
Role: Active
Delete session on Down: True
Client Registered: BGP
Uptime: 00:07:55
Statistics:
Number of packets received from neighbor: 4762
Number of packets sent to neighbor: 4490
Number of state changes: 2
Number of messages from IFA about port state change: 0
Number of messages communicated b/w Manager and Agent: 5

Session Discriminator: 10
Neighbor Discriminator: 11
Local Addr: 2.2.2.3
Local MAC Addr: 00:01:e8:66:da:34
Remote Addr: 2.2.2.2
Remote MAC Addr: 00:01:e8:8a:da:7b
Int: TenGigabitEthernet 6/2
State: Up
Configured parameters:
TX: 200ms, RX: 200ms, Multiplier: 3
Neighbor parameters:
TX: 200ms, RX: 200ms, Multiplier: 3
Actual parameters:
TX: 200ms, RX: 200ms, Multiplier: 3
Role: Active
Delete session on Down: True
Client Registered: BGP
Uptime: 00:02:22
Statistics:
Number of packets received from neighbor: 1428
Number of packets sent to neighbor: 1428
Number of state changes: 1
Number of messages from IFA about port state change: 0
Number of messages communicated b/w Manager and Agent: 4

The following example shows viewing BFD summary information.

The bold line shows the message displayed when you enable BFD for BGP connections.

R2# show ip bgp summary
BGP router identifier 10.0.0.1, local AS number 2
BGP table version is 0, main routing table version 0
BFD is enabled, Interval 200 Min_rx 200 Multiplier 3 Role Active
3 neighbor(s) using 24168 bytes of memory

Neighbor AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down   State/Pfx

1.1.1.2  1  282     281     0      0   0    00:38:12  0
2.2.2.2  1  273     273     0      0  (0)   04:32:26  0
3.3.3.2  1  282     281     0      0   0    00:38:12  0

The following example shows viewing BFD information for a specified neighbor.

R2# show ip bgp neighbors 2.2.2.2

BGP neighbor is 2.2.2.2, remote AS 1, external link
  BGP version 4, remote router ID 12.0.0.4
  BGP state ESTABLISHED, in this state for 00:05:33
  Last read 00:00:30, last write 00:00:30
  Hold time is 180, keepalive interval is 60 seconds
  Received 8 messages, 0 in queue
    1 opens, 0 notifications, 0 updates
    7 keepalives, 0 route refresh requests
  Sent 9 messages, 0 in queue
    2 opens, 0 notifications, 0 updates
    7 keepalives, 0 route refresh requests
  Minimum time between advertisement runs is 30 seconds
  Minimum time before advertisements start is 0 seconds

Capabilities received from neighbor for IPv4 Unicast :
  MULTIPROTO_EXT(1)
  ROUTE_REFRESH(2)
  CISCO_ROUTE_REFRESH(128)

Capabilities advertised to neighbor for IPv4 Unicast :
  MULTIPROTO_EXT(1)
  ROUTE_REFRESH(2)
  CISCO_ROUTE_REFRESH(128)

Neighbor is using BGP global mode BFD configuration

For address family: IPv4 Unicast
BGP table version 0, neighbor version 0
Prefixes accepted 0 (consume 0 bytes), withdrawn 0 by peer, martian prefixes ignored 0
Prefixes advertised 0, denied 0, withdrawn 0 from peer

  Connections established 1; dropped 0
  Last reset never
Local host: 2.2.2.3, Local port: 63805
Foreign host: 2.2.2.2, Foreign port: 179
E1200i_R2#

R2# show ip bgp neighbors 2.2.2.3

BGP neighbor is 2.2.2.3, remote AS 1, external link
  Member of peer-group pg1 for session parameters
  BGP version 4, remote router ID 12.0.0.4
  BGP state ESTABLISHED, in this state for 00:05:33
  ...
  Neighbor is using BGP neighbor mode BFD configuration
  Peer active in peer-group outbound optimization
...

R2# show ip bgp neighbors 2.2.2.4

BGP neighbor is 2.2.2.4, remote AS 1, external link
  Member of peer-group pg1 for session parameters
  BGP version 4, remote router ID 12.0.0.4
  BGP state ESTABLISHED, in this state for 00:05:33
  ...
  Neighbor is using BGP peer-group mode BFD configuration
  Peer active in peer-group outbound optimization
  ...