Configuring BGP4
December 2005 © Foundry Networks, Inc. 21 - 73
Displaying BGP4 Neighbor Information
To view BGP4 neighbor information including the values for all the configured parameters, enter the following
command.
NOTE: The display shows all the configured parameters for the neighbor. Only the parameters that have values
different from their defaults are shown.
This example shows how to display information for a specific neighbor, by specifying the neighbor’s IP address
with the command. None of the other display options are used; thus, all of the information is displayed for the
neighbor. The number in the far left column indicates the neighbor for which information is displayed. When you
list information for multiple neighbors, this number makes the display easier to read.
The TCP statistics at the end of the display show status for the TCP session with the neighbor. Most of the fields
show information stored in the Layer 3 Switch’s Transmission Control Block (TCB) for the TCP session between
the Layer 3 Switch and its neighbor. These fields are described in detail in section 3.2 of RFC 793, “Transmission
Control Protocol Functional Specification”.
Syntax: show ip bgp neighbors [<ip-addr> [advertised-routes [detail [<ip-addr>[/<mask-bits>]]]] |
[attribute-entries [detail]] | [flap-statistics] | [last-packet-with-error] | [received prefix-filter] |
[received-routes] | [routes [best] | [detail [best] | [not-installed-best] | [unreachable]] |
[rib-out-routes [<ip-addr>/<mask-bits> | <ip-addr> <net-mask> | detail]] | [routes-summary]]
FESX424 Router(config-bgp-router)# show ip bgp neighbor 10.4.0.2
1 IP Address: 10.4.0.2, AS: 5 (EBGP), RouterID: 100.0.0.1
Description: neighbor 10.4.0.2
State: ESTABLISHED, Time: 0h1m0s, KeepAliveTime: 0, HoldTime: 0
PeerGroup: pg1
Multihop-EBGP: yes, ttl: 1
RouteReflectorClient: yes
SendCommunity: yes
NextHopSelf: yes
DefaultOriginate: yes (default sent)
MaximumPrefixLimit: 90000
RemovePrivateAs: : yes
RefreshCapability: Received
Route Filter Policies:
Distribute-list: (out) 20
Filter-list: (in) 30
Prefix-list: (in) pf1
Route-map: (in) setnp1 (out) setnp2
Messages: Open Update KeepAlive Notification Refresh-Req
Sent : 1 1 1 0 0
Received: 1 8 1 0 0
Last Update Time: NLRI Withdraw NLRI Withdraw
Tx: 0h0m59s --- Rx: 0h0m59s ---
Last Connection Reset Reason:Unknown
Notification Sent: Unspecified
Notification Received: Unspecified
TCP Connection state: ESTABLISHED
Local host: 10.4.0.1, Local Port: 179
Remote host: 10.4.0.2, Remote Port: 8053
ISentSeq: 52837276 SendNext: 52837392 TotUnAck: 0
TotSent: 116 ReTrans: 0 UnAckSeq: 52837392
IRcvSeq: 2155052043 RcvNext: 2155052536 SendWnd: 16384
TotalRcv: 493 DupliRcv: 0 RcvWnd: 16384
SendQue: 0 RcvQue: 0 CngstWnd: 1460
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