256
Protocol: BGP
Diag Info: No Diagnostic
The output shows that a BFD session has been established between Switch A and Switch C.
# Display BGP peer information on Switch C.
<SwitchC> display bgp peer ipv4
BGP local router ID: 3.3.3.3
Local AS number: 200
Total number of peers: 2 Peers in established state: 2
Peer AS MsgRcvd MsgSent OutQ PrefRcv Up/Down State
2.0.1.1 200 4 5 0 0 00:01:55 Established
3.0.1.1 200 4 5 0 0 00:01:52 Established
The output shows that Switch C has established two BGP connections with Switch A, and both
connections are in Established state.
# Display route 1.1.1.0/24 on Switch C.
<SwitchC> display ip routing-table 1.1.1.0 24 verbose
Summary Count : 1
Destination: 1.1.1.0/24
Protocol: BGP Process ID: 0
SubProtID: 0x1 Age: 00h00m09s
Cost: 50 Preference: 255
Tag: 0 State: Active Adv
OrigTblID: 0x1 OrigVrf: default-vrf
TableID: 0x2 OrigAs: 0
NBRID: 0x15000001 LastAs: 0
AttrID: 0x1 Neighbor: 3.0.1.1
Flags: 0x10060 OrigNextHop: 3.0.1.1
Label: NULL RealNextHop: 3.0.2.1
BkLabel: NULL BkNextHop: N/A
Tunnel ID: Invalid Interface: Vlan-interface101
BkTunnel ID: Invalid BkInterface: N/A
The output shows that Switch C communicates with network 1.1.1.0/24 through the path Switch
C<—>Switch B<—>Switch A. Then the path Switch C<—>Switch B<—>Switch A fails.
# Enable debugging on Switch C.
<SwitchC> debugging bgp event
<SwitchC> terminal monitor
<SwitchC> terminal logging level 7
%Mar 12 19:02:59:241 2012 SwitchC BFD/6/FSM: -VDC=1; Sess[3.0.2.2/3.0.1.1, LD/RD:
513/513, Interface:N/A, SessType:Ctrl, LinkType:INET], Sta: UP->DOWN, Diag: 1
*Mar 12 19:02:59:242 2012 SwitchC BGP/7/DEBUG: -VDC=1;
BGP.: 3.0.1.1 Receive ManualStop event in ESTABLISHED state.
*Mar 12 19:02:59:242 2012 SwitchC BGP/7/DEBUG: -VDC=1;
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