HP MSR Series Configuration Manual page 394

2001::1
3001::1
# Display route 1200::0/64 on Router C. The output shows that Router A and Router C
communicate through Router B.
<RouterC> display ipv6 routing-table 1200::0 64 verbose
Routing Table :
Summary Count : 2
Destination : 1200::
NextHop : 3001::1
RelayNextHop : 3002::1
Neighbor : 3001::1
Interface : Ethernet1/1
State : Active Adv
Tunnel ID : 0x0
Age : 4538sec
Destination : 1200::
NextHop : 2001::1
RelayNextHop : 2002::1
Neighbor : 2001::1
Interface : Ethernet1/2
State : Invalid Adv
Tunnel ID : 0x0
Age : 4515sec
The output shows that Router C has two routes to reach network 1200::0/64: Router C<—>Router
B<—>Router A, which is the active route, and Router C<—>Router D<—>Router A, which is the
backup route.
# Enable BFD debugging on Router C.
<RouterC> debugging bfd scm
<RouterC> debugging bfd event
<RouterC> debugging bgp bfd
<RouterC> terminal monitor
<RouterC> terminal debugging
# The following debugging information shows that Router C can quickly detect the failure on
Router B.
%Nov 5 11:42:24:172 2009 RouterC BFD/5/BFD_CHANGE_FSM:
Sess[3002::2/3001::1,13/17,Eth1/1,Ctrl], Sta: UP->DOWN, Diag: 1
%Nov 5 11:42:24:172 2009 RouterC BGP/5/BGP_STATE_CHANGED: 3001::1 state is changed
from ESTABLISHED to IDLE.
*Nov 5 11:42:24:187 2009 RouterC RM/6/RMDEBUG: BGP_BFD: Recv BFD DOWN msg, Src IP
3002::2, Dst IP 3001::1, Instance ID 0.
*Nov 5 11:42:24:187 2009 RouterC RM/6/RMDEBUG: BGP_BFD: Reset BGP session 3001::1
for BFD session down.
*Nov 5 11:42:24:187 2009 RouterC RM/6/RMDEBUG: BGP_BFD: Send DELETE msg to BFD,
Connection type DIRECT, Src IP 3002::2, Dst IP 3001::1, Instance ID 0.
200 7
200 7
382
10 0 0 00:01:05 Established
10 0 0 00:01:34 Established
PrefixLength : 64
Preference
Tag
ProcessID
Protocol
Cost
Label
PrefixLength : 64
Preference
Tag
ProcessID
Protocol
Cost
Label
: 255
: 0H
: 0
: BGP4+
: 50
: NULL
: 255
: 0H
: 0
: BGP4+
: 100
: NULL