Hi community,
Picture from our setup is attached to this post.
I've tested our setup in case of a failure. Put port-chan 7 to Router-2 in offline mode.
I encounter that routing goes through port-Ch1 between BN-1 and BN-2.
Now my problem i've that isis does something I dont understand.
BN-1 and BN-2 are manualy configured and have this isis config:
router isis
net 49.0000.xxxx.xxxx.xxxx.00 -->xxx are different on every system
metric-style wide
redistribute connected
Failure case workes fine.
Now I does LAN automation - worked well.
I tested again failure case.
Now the routing does'nt go from BN-2 to BN1 over port-ch 1 else from BN-2 to LAN automated device.
isis neighbors shows "down" state over port-ch 1
Output From BN-1:
System Id Type Interface IP Address State Holdtime Circuit Id
Router-2 L1 Vl70 172.16.130.252 UP 24 Router-1.02
Router-2 L2 Vl70 172.16.130.252 UP 24 Router-1.02
BN-2 L1 Po1 172.16.131.5 DOWN 29 BN-2.01
BN-2 L2 Po1 172.16.131.5 DOWN 26 BN-2.01
BN-2 L1 Vl70 172.16.130.2 DOWN 25 BN-2.02
BN-2 L2 Vl70 172.16.130.2 DOWN 21 BN-2.02
LAN-Autom.Dev-1 L2 Te1/1/3 172.16.133.1 UP 25 47
Router-1 L1 Vl70 172.16.130.253 UP 9 Router-1.02
Router-1 L2 Vl70 172.16.130.253 UP 7 Router-1.02
Output From BN-2:
System Id Type Interface IP Address State Holdtime Circuit Id
Router-2 L1 Vl70 172.16.130.252 UP 26 Router-1.02
Router-2 L2 Vl70 172.16.130.252 UP 26 Router-1.02
BN-1 L1 Po1 172.16.131.4 DOWN 26 BN-1.01
BN-1 L2 Po1 172.16.131.4 DOWN 24 BN-2.01
BN-1 L1 Vl70 172.16.130.1 DOWN 26 Router-1.02
BN-1 L2 Vl70 172.16.130.1 DOWN 22 Router-1.02
LAN-Autom.Dev-1 L2 Te1/1/3 172.16.133.4 UP 23 48
Router-1 L1 Vl70 172.16.130.253 UP 8 Router-1.02
Router-1 L2 Vl70 172.16.130.253 UP 8 Router-1.02
I've checked both BN configurations and see that router isis config have more lines after LAN Automation Workflow.
+ log-adjacency-changes
+ nsf ietf
+ bfd all-interfaces
I tryed a litte bit and remove the line "bfd all-interfaces" from ech BN and now my isis between BN-1 and BN-2 worked again.
Output from BN-1
System Id Type Interface IP Address State Holdtime Circuit Id
Router-2 L1 Vl70 172.16.130.252 UP 23 Router-1.02
Router-2 L2 Vl70 172.16.130.252 UP 23 Router-1.02
BN-2 L1 Po1 172.16.131.5 UP 8 BN-2.01
BN-2 L2 Po1 172.16.131.5 UP 8 BN-2.01
BN-2 L1 Vl70 172.16.130.2 UP 25 Router-1.02
BN-2 L2 Vl70 172.16.130.2 UP 21 Router-1.02
LAN-Autom.Dev-1 L2 Te1/1/3 172.16.133.1 UP 26 47
Router-1 L1 Vl70 172.16.130.253 UP 9 Router-1.02
Router-1 L2 Vl70 172.16.130.253 UP 9 Router-1.02
So now my questions:
What does "bfd all-interfaces" and is there any need to leave it in the system wide configuration?
bfd = bidirectional forwarding detection
I saw in a document that i can disable bfd in interface configuration and leave it system wide for lan automated devices so it may be worked on port-ch 1 on BN-1 and BN-2.
Thanks a lot for your answers and i hope my problem is clear to understand.
Edit
I did a "debug isis bfd port-channel 1" on every BN.
Maybe this will help to find the error?
Output debug BN-1:
Oct 15 13:19:01.117: ISIS-BFD: RCV ADJ deleted notification.
Oct 15 13:19:01.117: ISIS-BFD: Delete all associated BFD sessions.
Oct 15 13:19:01.117: ISIS-BFD: free bfd session
Oct 15 13:19:01.117: %BFD-6-BFD_SESS_DESTROYED: BFD-SYSLOG: bfd_session_destroyed, handle:2 neigh proc:ISIS, idb:Port-channel1 handle:2 active
Oct 15 13:19:01.117: ISIS-BFD: global bfd session deleted
Oct 15 13:19:01.117: ISIS-BFD: BFD session{Port-channel1, 172.16.131.5} deleted due to Adjacency delete
Oct 15 13:19:02.113: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to down
Oct 15 13:19:03.107: %LINK-5-CHANGED: Interface TenGigabitEthernet1/1/1, changed state to administratively down
Oct 15 13:19:03.112: %LINK-5-CHANGED: Interface TenGigabitEthernet1/1/2, changed state to administratively down
Oct 15 13:19:03.112: %LINK-5-CHANGED: Interface Port-channel1, changed state to administratively down
Oct 15 13:19:04.108: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/1, changed state to down
Oct 15 13:19:04.112: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/2, changed state to down
Oct 15 13:19:07.132: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up
Oct 15 13:19:07.133: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/1, changed state to up
Oct 15 13:19:07.134: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/2, changed state to up
Oct 15 13:19:08.132: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
Oct 15 13:19:08.133: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/1, changed state to up
Oct 15 13:19:08.234: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/2, changed state to up
Oct 15 13:19:10.122: ISIS-BFD: Failed to get AF ipv4 address from adjacency.
Oct 15 13:19:10.122: ISIS-BFD: Create BFD session(Port-channel1, 172.16.131.5), adj intf Port-channel1
Oct 15 13:19:10.122: %BFD-6-BFD_SESS_CREATED: BFD-SYSLOG: bfd_session_created, neigh 172.16.131.5 proc:ISIS, idb:Port-channel1 handle:2 act
Oct 15 13:19:10.122: ISIS-BFD: BFD session{Port-channel1, 172.16.131.5} successfully added
Oct 15 13:19:10.122: ISIS-BFD: Neighbor bfd IP Enabled
Oct 15 13:19:10.122: ISIS-BFD: RCV NBR ADJ BFD change: afi:ipv4 nbr_bfd_enabled:1
Oct 15 13:19:10.122: ISIS-BFD: isis bfd tlv changed, levelindex 0
Oct 15 13:19:10.122: ISIS-BFD: isis proc bfd change, level 1, intf Po1
Oct 15 13:19:10.122: ISIS-BFD: mtid 0 topo usable 0, level 1
Oct 15 13:19:10.122: ISIS-BFD: HDL BFD CHG: nbr_usable_changed:1, event:1,old_adj_state:INIT, new_adj_state:DOWN
Oct 15 13:19:10.128: ISIS-BFD: isis bfd tlv changed, levelindex 1
Oct 15 13:19:10.128: ISIS-BFD: isis proc bfd change, level 2, intf Po1
Oct 15 13:19:10.128: ISIS-BFD: mtid 0 topo usable 0, level 2
Oct 15 13:19:10.128: ISIS-BFD: HDL BFD CHG: nbr_usable_changed:1, event:1,old_adj_state:DOWN, new_adj_state:DOWN
Output debug BN-2:
Oct 15 13:19:03.148: ISIS-BFD: RCV ADJ deleted notification.
Oct 15 13:19:03.148: ISIS-BFD: Delete all associated BFD sessions.
Oct 15 13:19:03.148: ISIS-BFD: free bfd session
Oct 15 13:19:03.148: %BFD-6-BFD_SESS_DESTROYED: BFD-SYSLOG: bfd_session_destroyed, handle:2 neigh proc:ISIS, idb:Port-channel1 handle:2 active
Oct 15 13:19:03.148: ISIS-BFD: global bfd session deleted
Oct 15 13:19:03.148: ISIS-BFD: BFD session{Port-channel1, 172.16.131.4} deleted due to Adjacency delete
Oct 15 13:19:03.148: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/2, changed state to down
Oct 15 13:19:07.277: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/1, changed state to up
Oct 15 13:19:07.284: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/2, changed state to up
Oct 15 13:19:08.276: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/1, changed state to up
Oct 15 13:19:08.284: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/2, changed state to up
Oct 15 13:19:09.120: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up
Oct 15 13:19:10.119: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
Oct 15 13:19:10.126: ISIS-BFD: Failed to get AF ipv4 address from adjacency.
Oct 15 13:19:10.126: ISIS-BFD: Create BFD session(Port-channel1, 172.16.131.4), adj intf Port-channel1
Oct 15 13:19:10.126: %BFD-6-BFD_SESS_CREATED: BFD-SYSLOG: bfd_session_created, neigh 172.16.131.4 proc:ISIS, idb:Port-channel1 handle:2 act
Oct 15 13:19:10.126: ISIS-BFD: BFD session{Port-channel1, 172.16.131.4} successfully added
Oct 15 13:19:10.126: ISIS-BFD: Neighbor bfd IP Enabled
Oct 15 13:19:10.126: ISIS-BFD: RCV NBR ADJ BFD change: afi:ipv4 nbr_bfd_enabled:1
Oct 15 13:19:10.126: ISIS-BFD: isis bfd tlv changed, levelindex 0
Oct 15 13:19:10.126: ISIS-BFD: isis proc bfd change, level 1, intf Po1
Oct 15 13:19:10.126: ISIS-BFD: mtid 0 topo usable 0, level 1
Oct 15 13:19:10.126: ISIS-BFD: HDL BFD CHG: nbr_usable_changed:1, event:1,old_adj_state:INIT, new_adj_state:DOWN
Oct 15 13:19:10.128: ISIS-BFD: isis bfd tlv changed, levelindex 1
Oct 15 13:19:10.128: ISIS-BFD: isis proc bfd change, level 2, intf Po1
Oct 15 13:19:10.128: ISIS-BFD: mtid 0 topo usable 0, level 2
Oct 15 13:19:10.128: ISIS-BFD: HDL BFD CHG: nbr_usable_changed:1, event:1,old_adj_state:DOWN, new_adj_state:DOWN
