PIM-BFD Configuration
PIM is a multicast routing protocol which uses Hello messages to detect adjacent node failure. This mechanism is very slow and leads to control plane overhead when interval between hello messages is set to minimum.
BFD is a protocol designed to detect link failures superfast, routing protocols such as OSPF, ISIS uses BFD to get link failure notification.
BFD detects the link failure immediately after the original DR fails and triggers new DR election. The BFD protocol uses control packets and shorter detection time limits to more rapidly detect failures in a network.
Topology
PIM-BFD Configuration Topology
PIM-BFD Configuration
This document captures requirements to use BFD with PIM IPv4 and IPv6 to detect adjacent neighbor reachability failure.
Note: IPv6 PIM is supported in Qumran2 series platforms.
R1
#configure terminal | Enter configuration mode. |
OcNOS(config)#ip multicast-routing | Configure IP multicast routing |
OcNOS(config)#ipv6 multicast-routing | Configure IPv6 multicast routing |
OcNOS(config)#interface xe29 | Entering in to interface |
OcNOS(config-if)#ipv6 address 5001::1/64 | Configure IPv6 address |
OcNOS(config-if)#ip address 14.14.14.1/24 | Configure IPv4 address |
OcNOS(config-if)#ip pim sparse-mode | Configure PIM sparse mode |
OcNOS(config-if)#ipv6 router ospf area 0.0.0.0 tag 1 instance-id 0 | Configure OSPF to interface |
OcNOS(config-if)#ipv6 pim sparse-mode | Configure IPv6 PIM sparse mode |
OcNOS(config-if)#commit | Commit all the transactions |
OcNOS(config)#interface ce0 | Entering in to interface |
OcNOS(config-if)#ipv6 address 2001::1/64 | Configure IPv6 address |
OcNOS(config-if)#ip address 12.12.12.1/24 | Configure IP address |
OcNOS(config-if)#ip pim sparse-mode | Configure PIM sparse mode |
OcNOS(config-if)#ipv6 router ospf area 0.0.0.0 tag 1 instance-id 0 | Configure OSPF to interface |
OcNOS(config-if)#ipv6 pim sparse-mode | Configure IPv6 PIM sparse mode |
OcNOS(config-if)#commit | Commit all the transactions |
OcNOS(config-if)#exit | Exit |
OcNOS(config)#interface xe4 | Entering in to interface |
OcNOS(config-if)#ipv6 address 3001::1/64 | Configure IPv6 address |
OcNOS(config-if)#ip address 13.13.13.1/24 | Configure IP address |
OcNOS(config-if)#ip pim sparse-mode | Configure PIM sparse mode |
OcNOS(config-if)# ipv6 router ospf area 0.0.0.0 tag 1 instance-id 0 | Configure OSPF to interface |
OcNOS(config-if)#ipv6 pim sparse-mode | Configure IPv6 PIM sparse mode |
OcNOS(config-if)#commit | Commit all the transactions |
OcNOS(config-if)#exit | Exit |
OcNOS(config)#router ospf 1 | Configure IP OSPF |
OcNOS(config-router)#ospf router-id 20.20.20.1 | Configure router id under ospf |
OcNOS(config-router)#network 12.12.12.0/24 area 0.0.0.0 | Add network under OSPF |
OcNOS(config-router)#network 13.13.13.0/24 area 0.0.0.0 | Add network under OSPF |
OcNOS(config-router)#network 14.14.14.0/24 area 0.0.0.0 | Add network under OSPF |
OcNOS(config-router)#network 20.20.20.1/32 area 0.0.0.0 | Add network under OSPF |
OcNOS(config)#router ipv6 ospf 1 | Configure IPv6 OSPF |
OcNOS(config-router)#router-id 1.1.1.1 | Configure router ID under OSPF |
OcNOS(config-router)#commit | Commit all the transactions |
OcNOS(config)#exit | Exit |
R2
#configure terminal | Enter configuration mode. |
OcNOS(config)#bridge 1 protocol mstp | Configure bridge 1 protocol MSTP/IEEE VLAN bridge |
OcNOS(config)#vlan database | Entering in to VLAN database |
OcNOS(config-vlan)#vlan 120 bridge 1 state enable | Configure VLAN 120 with bridge 1 state enable |
OcNOS(config-vlan)#ip multicast-routing | Configure IP multicast routing |
OcNOS(config-vlan)#ipv6 multicast-routing | Configure IPv6 multicast routing |
OcNOS(config)#interface vlan1.120 | Entering VLAN interface |
OcNOS(config-if)#ipv6 address 1001::2/64 | Configure IPv6 address |
OcNOS(config-if)#ip address 10.10.10.2/24 | Configure IP address |
OcNOS(config-if)#ip pim sparse-mode | Configure PIM sparse mode |
OcNOS(config-if)#ipv6 router ospf area 0.0.0.0 tag 1 instance-id 0 | Configure OSPFv6 |
OcNOS(config-if)#ipv6 pim bfd | Configure IPv6 PIM BFD |
OcNOS(config-if)#ip pim bfd | Configure IP BFD |
OcNOS(config-if)#ipv6 pim sparse-mode | Configure IPv6 PIM sparse mode |
OcNOS(config-if)#commit | Commit all the transactions |
OcNOS(config-if)#exit | Exit |
OcNOS(config)#ipv6 pim bsr-candidate vlan1.120 | Configure IPv6 PIM BSR candidate |
OcNOS(config)#commit | Commit all the transactions |
OcNOS(config)#interface ce11/1 | Entering interface ce7/1 |
OcNOS(config-if)#switchport | Configure Switchport |
OcNOS(config-if)#bridge-group 1 | Configure bridge group1 |
OcNOS(config-if)#switchport mode access | Configure switchport mode access |
OcNOS(config-if)#switchport access vlan 120 | Configure switchport access mode |
OcNOS(config-if)#commit | Commit all the transactions |
OcNOS(config-if)#interface ce9/1 | Entering interface ce9/1 |
OcNOS(config-if)#ipv6 address 2001::2/64 | Configure IPv6 address |
OcNOS(config-if)#ip address 12.12.12.2/24 | Configure IP address |
OcNOS(config-if)#ipv6 router ospf area 0.0.0.0 tag 1 instance-id 0 | Configure OSPFv6 under interface |
OcNOS(config-if)#ip pim sparse-mode | Configure PIM sparse mode |
OcNOS(config-if)#ipv6 pim sparse-mode | Configure IPv6 PIM sparse mode |
OcNOS(config-if)#commit | Commit all the transactions |
OcNOS(config-if)#exit | Exit |
OcNOS(config)#router ospf 1 | Configure IP OSPF |
OcNOS(config-router)#ospf router-id 20.20.20.2 | Configure router ID under ospf |
OcNOS(config-router)#network 10.10.10.0/24 area 0.0.0.0 | Add network under OSPF |
OcNOS(config-router)#network 12.12.12.0/24 area 0.0.0.0 | Add network under OSPF |
OcNOS(config-router)#network 20.20.20.2/32 area 0.0.0.0 | Add network under OSPF |
OcNOS(config)#router ipv6 ospf 1 | Configure IPv6 OSPF |
OcNOS(config-router)#router-id 2.2.2.2 | Configure router ID under OSPF |
OcNOS(config-router)#commit | Commit all the transactions |
OcNOS(config-if)#exit | Exit |
R3
#configure terminal | Enter configuration mode. |
OcNOS(config)#bridge 1 protocol mstp | Configure bridge 1 protocol MSTP/IEEE VLAN bridge |
OcNOS(config)#vlan database | Entering in to VLAN database |
OcNOS(config-vlan)#vlan 120 bridge 1 state enable | Configure VLAN 120 with bridge 1 state enable |
OcNOS(config-vlan)#ip multicast-routing | Configure IP multicast routing |
OcNOS(config-vlan)#ipv6 multicast-routing | Configure IPv6 multicast routing |
OcNOS(config)#interface vlan1.120 | Entering VLAN interface |
OcNOS(config-if)#ipv6 address 1001::3/64 | Configure IPv6 address |
OcNOS(config-if)#ip address 10.10.10.2/24 | Configure IP address |
OcNOS(config-if)#ipv6 router ospf area 0.0.0.0 tag 1 instance-id 0 | Configure OSPFv6 |
OcNOS(config-if)#ip pim sparse-mode | Configure PIM sparse mode |
OcNOS(config-if)#ip pim bfd | Configure PIM BFD |
OcNOS(config-if)#ipv6 pim bfd | Configure IPv6 PIM BFD |
OcNOS(config-if)#ipv6 pim sparse-mode | Configure IPv6 PIM sparse mode |
OcNOS(config-if)#commit | Commit all the transactions |
OcNOS(config-if)#exit | Exit |
OcNOS(config)#ipv6 pim bsr-candidate vlan1.120 | Configure IPv6 PIM BSR candidate |
OcNOS(config)#commit | Commit all the transactions |
OcNOS(config)#interface xe7 | Entering interface ce7/1 |
OcNOS(config-if)#switchport | Configure Switchport |
OcNOS(config-if)#bridge-group 1 | Configure bridge group1 |
OcNOS(config-if)#switchport mode access | Configure switchport mode access |
OcNOS(config-if)#switchport access vlan 120 | Configure switchport access mode |
OcNOS(config-if)#commit | Commit all the transactions |
OCNOS(config)#interface xe8 | Entering interface |
OCNOS(config-if)#ipv6 address 3001::2/64 | Configure IPv6 address |
OCNOS(config-if)#ip address 13.13.13.2/24 | Configure IP address |
OCNOS(config-if)#ipv6 router ospf area 0.0.0.0 tag 1 instance-id 0 | Configure OSPFv6 under interface |
OCNOS(config-if)#ipv6 pim sparse-mode | Configure IPv6 PIM sparse mode |
OCNOS(config-if)#ip pim sparse-mode | Configure IP PIM sparse mode |
OCNOS(config-if)#commit | Commit all the transactions |
OCNOS(config-if)#exit | Exit |
OcNOS(config)#router ospf 1 | Configure IP OSPF |
OcNOS(config-router)#ospf router-id 20.20.20.3 | Configure router id under OSPF |
OcNOS(config-router)#network 10.10.10.0/24 area 0.0.0.0 | Add network under OSPF |
OcNOS(config-router)#network 13.13.13.0/24 area 0.0.0.0 | Add network under OSPF |
OcNOS(config-router)#network 20.20.20.3/32 area 0.0.0.0 | Add network under OSPF |
OcNOS(config)#router ipv6 ospf 1 | Configure IPv6 OSPF |
OcNOS(config-router)#router-id 3.3.3.3 | Configure router id under OSPF |
OcNOS(config-router)#commit | Commit all the transactions |
OCNOS(config-if)#exit | Exit |
SWITCH
#configure terminal | Enter configuration mode. |
(config)#bridge 1 protocol mstp | Bridge config |
OcNOS(config)#vlan database | Entering in to VLAN database |
OcNOS(config-vlan)#vlan 120 bridge 1 state enable | Configure VLAN 120 with bridge 1 state enable |
OcNOS(config-if)#interface ce49 | Entering interface xe1 |
OcNOS(config-if)#switchport | Configure Switchport |
OcNOS(config-if)#bridge-group 1 | Configure bridge group1 |
OcNOS(config-if)#switchport mode access | Configure switchport mode access |
OcNOS(config-if)#switchport access vlan 120 | Configure switchport access mode |
OcNOS (config-if)#exit | Exit interface mode. |
OcNOS(config-if)#interface xe37 | Entering interface xe1 |
OcNOS(config-if)#switchport | Configure Switchport |
OcNOS(config-if)#bridge-group 1 | Configure bridge group1 |
OcNOS(config-if)#switchport mode access | Configure switchport mode access |
OcNOS(config-if)#switchport access vlan 120 | Configure switchport access mode |
OcNOS (config-if)#exit | Exit interface mode. |
OcNOS(config-if)#interface xe47 | Entering interface xe1 |
OcNOS(config-if)#switchport | Configure Switchport |
OcNOS(config-if)#bridge-group 1 | Configure bridge group1 |
OcNOS(config-if)#switchport mode access | Configure switchport mode access |
OcNOS(config-if)#switchport access vlan 120 | Configure switchport access mode |
OcNOS (config-if)#exit | Exit interface mode. |
OcNOS(config-if)#commit | Commit all the transactions |
R4
#configure terminal | Enter configuration mode. |
OcNOS(config)#ipv6 multicast-routing | Configure IPv6 multicast routing |
OcNOS(config)#ip multicast-routing | Configure IP multicast routing |
OcNOS(config)#interface xe18 | Entering in to interface |
OcNOS(config-if)#ipv6 address 6001::1/64 | Configure IPv6 address |
OcNOS(config-if)#ip address 16.16.16.1/24 | Configure IP address |
OcNOS(config-if)#ipv6 mld version 2 | Configure MLD version 2 |
OcNOS(config-if)#ipv6 router ospf area 0.0.0.0 tag 1 instance-id 0 | Configure OSPF to interface |
OcNOS(config-if)#ip pim sparse-mode | Configure PIM sparse mode |
OcNOS(config-if)#ipv6 pim sparse-mode | Configure IPv6 PIM sparse mode |
OcNOS(config-if)#commit | Commit all the transactions |
OcNOS(config)#interface xe5 | Entering in to interface |
OcNOS(config-if)#ipv6 address 1001::1/64 | Configure IPv6 address |
OcNOS(config-if)#ip address 10.10.10.1/24 | Configure IP address |
OcNOS(config-if)#ipv6 router ospf area 0.0.0.0 tag 1 instance-id 0 | Configure OSPF to interface |
OcNOS(config-if)#ip pim sparse-mode | Configure PIM sparse mode |
OcNOS(config-if)#ipv6 pim sparse-mode | Configure IPv6 PIM sparse mode |
OcNOS(config-if)#ip pim bfd | Configure IP PIM BFD |
OcNOS(config-if)#ipv6 pim bfd | Configure IPv6 PIM BFD |
OcNOS(config-if)#commit | Commit all the transactions |
OcNOS(config-if)#exit | Exit |
OcNOS(config)#router ospf 1 | Configure IP OSPF |
OcNOS(config-router)#ospf router-id 20.20.20.4 | Configure router id under OSPF |
OcNOS(config-router)#network 10.10.10.0/24 area 0.0.0.0 | Add network under OSPF |
OcNOS(config-router)#network 16.16.16.0/24 area 0.0.0.0 | Add network under OSPF |
OcNOS(config-router)#network 20.20.20.4/32 area 0.0.0.0 | Add network under OSPF |
OcNOS(config)#router ipv6 ospf 1 | Configure IPv6 OSPF |
OcNOS(config-router)#router-id 5.5.5.5 | Configure router id under OSPF |
OcNOS(config-router)#commit | Commit all the transactions |
OcNOS(config)#exit | Exit |
Validation
R1
#show ipv6 pim neighbor
Total number of PIM neighbors:2
Neighbor Address Interface Uptime/Expires DR
Pri/Mode
fe80::36ef:b6ff:fe94:3df5 ce0 00:00:38/00:01:24 1 /
fe80::e201:a6ff:fe4b:f30a xe4 00:00:41/00:01:30 1 /
#show ip pim neighbor
Total number of PIM neighbors:2
Neighbor Interface Uptime/Expires Ver DR
Address Priority/Mode
12.12.12.2 ce0 00:11:17/00:01:28 v2 1 / DR
13.13.13.2 xe4 00:11:19/00:01:27 v2 1 / DR
R2
#show ipv6 pim neighbor
Total number of PIM neighbors:3
Neighbor Address Interface Uptime/Expires DR
Pri/Mode
fe80::eac5:7aff:feb1:6b11 ce9/1 00:12:51/00:01:24 1 / DR
fe80::e201:a6ff:fe4b:f301 vlan1.120 00:02:28/00:01:17 1 /
fe80::eac5:7aff:fe78:a2cc vlan1.120 00:02:28/00:01:29 1 / DR
#show ip pim neighbor
Total number of PIM neighbors:3
Neighbor Interface Uptime/Expires Ver DR
Address Priority/Mode
12.12.12.1 ce9/1 00:09:15/00:01:32 v2 1 /
10.10.10.1 vlan1.120 00:09:44/00:01:31 v2 1 /
10.10.10.3 vlan1.120 00:10:56/00:01:20 v2 1 / DR
#show bfd session
BFD process for VRF: (DEFAULT VRF)
=====================================================================================
Sess-Idx Remote-Disc Lower-Layer Sess-Type Sess-State UP-Time Interface Down-Reason Remote-Addr
258 NA IPv6 Micro-BFD Up 00:34:25 vlan1.120 NA fe80::eac5:7aff:fea8:7cb9/128
HW SESS: TYPE INTERFACE LOC_DISC REM_DISC LOCAL_STATE
=============================================================
Single Hop ce11/1 2 2056 Up
259 NA IPv4 Micro-BFD Up 00:23:03 vlan1.120 NA 10.10.10.1/32
HW SESS: TYPE INTERFACE LOC_DISC REM_DISC LOCAL_STATE
=============================================================
Single Hop ce11/1 3 4 Up
257 NA IPv4 Micro-BFD Up 00:00:16 vlan1.120 NA 10.10.10.3/32
HW SESS: TYPE INTERFACE LOC_DISC REM_DISC LOCAL_STATE
=============================================================
Single Hop ce11/1 1 4 Up
260 NA IPv6 Micro-BFD Up 00:00:09 vlan1.120 NA fe80::e201:a6ff:fe4b:f301/128
HW SESS: TYPE INTERFACE LOC_DISC REM_DISC LOCAL_STATE
=============================================================
Single Hop ce11/1 4 2052 Up
Number of Sessions: 4
R3
#show ipv6 pim neighbor
Total number of PIM neighbors:3
Neighbor Address Interface Uptime/Expires DR
Pri/Mode
fe80::eac5:7aff:feb1:6b15 xe8 00:02:55/00:01:22 1 / DR
fe80::36ef:b6ff:fe94:3db4 vlan1.120 00:04:50/00:01:37 1 /
fe80::eac5:7aff:fea8:7cb9 vlan1.120 00:04:51/00:01:27 1 / DR
#show bfd session
BFD process for VRF: (DEFAULT VRF)
=====================================================================================
Sess-Idx Remote-Disc Lower-Layer Sess-Type Sess-State UP-Time Interface Down-Reason Remote-Addr
4100 NA IPv4 Micro-BFD Up 00:00:08 vlan1.120 NA 10.10.10.2/32
HW SESS: TYPE INTERFACE LOC_DISC REM_DISC LOCAL_STATE
=============================================================
Single Hop 4 1 Up
4104 NA IPv4 Micro-BFD Up 00:00:08 vlan1.120 NA 10.10.10.1/32
HW SESS: TYPE INTERFACE LOC_DISC REM_DISC LOCAL_STATE
=============================================================
Single Hop 8 8 Up
4108 NA IPv6 Micro-BFD Up 00:00:07 vlan1.120 NA fe80::36ef:b6ff:fe94:3db4/128
HW SESS: TYPE INTERFACE LOC_DISC REM_DISC LOCAL_STATE
=============================================================
Single Hop 2052 4 Up
4112 NA IPv6 Micro-BFD Up 00:00:07 vlan1.120 NA fe80::eac5:7aff:fea8:7cb9/128
HW SESS: TYPE INTERFACE LOC_DISC REM_DISC LOCAL_STATE
=============================================================
Single Hop 2056 2052 Up
Number of Sessions: 4
R4
#show ipv6 pim neighbor
Total number of PIM neighbors:2
Neighbor Address Interface Uptime/Expires DR
Pri/Mode
fe80::36ef:b6ff:fe94:3db4 xe5 00:11:48/00:01:37 1 /
fe80::e201:a6ff:fe4b:f301 xe5 00:08:51/00:01:24 1 /
#show ip pim neighbor
Total number of PIM neighbors:2
Neighbor Interface Uptime/Expires Ver DR
Address Priority/Mode
10.10.10.2 xe5 00:09:03/00:01:25 v2 1 /
10.10.10.3 xe5 00:09:07/00:01:27 v2 1 / DR
#show bfd session
BFD process for VRF: (DEFAULT VRF)
=====================================================================================
Sess-Idx Remote-Disc Lower-Layer Sess-Type Sess-State UP-Time Interface Down-Reason Remote-Addr
2056 2 IPv6 Single-Hop Up 00:33:25 xe5 NA fe80::36ef:b6ff:fe94:3db4/128
4 3 IPv4 Single-Hop Up 00:22:04 xe5 NA 10.10.10.2/32
Number of Sessions: 2
#show ipv6 mld groups detail
MLD Connected Group Membership Details
Flags: (M - SSM Mapping, R - Remote,
SG - Static Group, SS - Static Source)
Interface: xe15
Group: ff06::2
Flags: R
Uptime: 00:01:18
Group mode: Include ()
State: Active
Last reporter: fe80::1
Group source list: (R - Remote, M - SSM Mapping, S - Static )
Include Source List :
Source Address Uptime v2 Exp Fwd Flags
5001::2 00:01:18 00:04:17 Yes R
#show ip igmp groups detail
IGMP Instance wide G-Recs Count is: 1
IGMP Connected Group Membership Details
Flags: (M - SSM Mapping, R - Remote, L - Local,
SG - Static Group, SS - Static Source)
Interface: xe15
Group: 231.1.1.1
Flags: R
Uptime: 00:01:24
Group mode: Include ()
State: Active
Last reporter: 16.16.16.2
Group source list: (R - Remote, M - SSM Mapping, S - Static, L - Local)
Include Source List :
Source Address Uptime v3 Exp Fwd Flags
14.14.14.2 00:01:24 00:04:07 Yes R
After Shutdown
#show bfd session
BFD process for VRF: (DEFAULT VRF)
=====================================================================================
Sess-Idx Remote-Disc Lower-Layer Sess-Type Sess-State UP-Time Interface Down-Reason Remote-Addr
Number of Sessions: 0