HPE FlexNetwork HSR6800 Configuration Manual page 343

Source IP: FE80::20F:FF:FE00:1202 (link-local address of Gigabitethernet2/1/1
on Router A)
Destination IP: FE80::20F:FF:FE00:1200 (link-local address of Gigabitethernet2/1/1
on Router B)
Session State: Up
Hold Time:
# Display routes to 2001:4::0/64 on Router A, and you can see that Router A communicates
with Router B through the Layer 2 switch.
<RouterA> display ipv6 routing-table 2001:4::0 64 verbose
Routing Table :
Summary Count : 2
Destination : 2001:4::
NextHop : 2001::2
IpPrecedence :
RelayNextHop : ::
Neighbor : ::
Interface : Gigabitethernet2/1/1
State : Active Adv
Tunnel ID : 0x0
Age : 4538sec
Destination : 2001:4::
NextHop : 2001:2::2
IpPrecedence :
RelayNextHop : ::
Neighbor : ::
Interface : Gigabitethernet2/1/2
State : Invalid Adv
Tunnel ID : 0x0
Age : 4515sec
# Enable BFD debugging on Router A.
<RouterA> debugging bfd scm
<RouterA> debugging bfd event
<RouterA> debugging ospfv3 event bfd
<RouterA> terminal debugging
# After the link between Router B and the Layer 2 switch fails, Router A quickly detects the
change on Router B.
%Nov 5 11:37:43:062 2009 RouterA BFD/5/BFD_CHANGE_FSM: Sess[FE80::20F:FF:FE00:1202/
FE80::20F:FF:FE00:1200,15/15,GE2/1/1,Ctrl], Sta: UP->DOWN, Diag: 1
%Nov 5 11:37:43:062 2009 RouterA OSPFV3/5/OSPFv3_NBR_CHG: OSPFv3 1 Neighbor
2.2.2.2(Gigabitethernet2/1/1) from Full to Down.
*Nov 5 11:37:43:062 2009 RouterA RM/6/RMDEBUG: OSPFv3 OSPFv3-BFD: Message Type rcv
BFD down, Connect Type direct-connect, Src IP Address FE80::20F:FF:FE00:1202, Dst IP
Address FE80::20F:FF:FE00:1200.
*Nov 5 11:37:43:062 2009 RouterA RM/6/RMDEBUG: OSPFv3 OSPFv3-BFD: Message Type delete
session, Connect Type direct-connect, Src IP Address FE80::20F:FF:FE00:1202, Dst IP
Address FE80::20F:FF:FE00:1200.
# Display the BFD information of Router A. You can see that Router A has removed its neighbor
relationship with Router B and therefore no information is output.
<RouterA> display bfd session
/
331
Interface: GE2/1/1
PrefixLength : 64
Preference
QosLcId
Tag
ProcessID
Protocol
Cost
Label
PrefixLength : 64
Preference
QosLcId
Tag
ProcessID
Protocol
Cost
Label
: 10
:
: 0H
: 0
: OSPFv3
: 1
: NULL
: 10
:
: 0H
: 0
: OSPFv3
: 2
: NULL