Ethernet CFM Configurations
This chapter contains examples of Ethernet Operations and Management (OAM) configurations using the Connectivity Fault Management (CFM) protocol.
Connectivity Fault Management detects, verifies, isolates and notifies connectivity failures on a Virtual Bridged LAN (B- VLAN) based on the protocol standard specified in IEEE 802.1ag 2007. It provides discovery and verification of paths through 802.1 bridges and LANs and is part of the Operation, Administration and Management (OAM) module. CFM is transparent to customer data being transported by a network and is capable of providing maximum fault management.
Note: CFM session flaps occur if the active LAG member transmitting and receiving CCM PDUs goes down and the LAG re-converges after hardware updates.
Continuity Check Message (CCM)
Topology
CFM Topology
Prerequisite
Configure below hardware-profile commands related to CFM in configuration mode and reboot the nodes.
hardware-profile filter cfm-domain-name-str enable
hardware-profile statistics cfm-ccm enable
SW1
SW1#configure terminal | Enter configure mode. |
SW1(config)#bridge 1 protocol rstp vlan-bridge | Create bridge 1 as an RSTP VLAN-aware bridge. |
SW1(config)#vlan database | Entering vlan database |
SW1(config-vlan)#vlan 512 bridge 1 state enable | Create VLAN 512 on bridge 1. |
SW1(config-vlan)#exit | Exit vlan database |
SW1(config)#interface ce49 | Configure interface ce49. |
SW1(config-if)#switchport | Configure the interface as switch port. |
SW1(config-if)#bridge-group 1 | Configure interface in bridge group 1. |
SW1(config-if)#switchport mode trunk | Configure interface mode as trunk. |
SW1(config-if)#switchport trunk allowed vlan all | Allow all VLANs on interface ce49. |
SW1(config-if)#exit | Exit config mode. |
SW1(config)#ethernet cfm domain-type character-string domain-name mdnam level 7 mip-creation default | Create cfm domain with type as character string and set mip creation criteria to default. |
SW1(config-ether-cfm)#service ma-type string ma-name testtm | Create ma type as string and configure the ma |
SW1(config-ether-cfm-ma)#vlan 25 bridge 1 | Configure vlan-id to associate the vlan to the MA |
SW1(config-ether-cfm-ma)#mip-creation default | Set the mip creation criteria to default for the MA |
SW1(config-ether-cfm-ma)#ethernet cfm mep down mpid 2 active true ce49 | Create down mep on ce49. |
SW1(config-ether-cfm-ma-mep)#cc multicast state enable | Enable cc multicast. |
SW1(config-ether-cfm-ma-mep)#exit-ether-ma-mep-mode | Exit CFM MEP configuration mode. |
SW1(config-ether-cfm-ma)#mep crosscheck mpid 1 | Configure crosscheck to remote MEP in VLAN 512. |
SW1(config-ether-cfm-ma)#cc interval 10ms | Enable cc interval for 10 millisecond. |
SW1(config-ether-cfm-ma)#exit-ether-ma-mode | Exit CFM MA configuration mode. |
SW1(config-ether-cfm)#exit | Exit ethernet CFM mode. |
SW1(config)#commit | Commit the configuration |
SW1(config)#exit | Exit the configure terminal mode |
SW2
SW2#configure terminal | Enter configure mode. |
SW2(config)#bridge 1 protocol rstp vlan-bridge | Create bridge 1 as an RSTP VLAN-aware bridge. |
SW2(config)#vlan database | Entering vlan database |
SW2(config-vlan)#vlan 512 bridge 1 state enable | Create VLAN 512 on bridge 1. |
SW2(config-vlan)#exit | Exit vlan database |
SW2(config)#interface ce0 | Configure interface ce0. |
SW2(config-if)#switchport | Configure the interface as switch port. |
SW2(config-if)#bridge-group 1 | Configure interface in bridge group 1. |
SW2(config-if)#switchport mode trunk | Configure interface mode as trunk. |
SW2(config-if)#switchport trunk allowed vlan all | Allow all VLANs on interface ce0. |
SW2(config-if)#exit | Exit config mode. |
SW2(config)#interface xe0 | Configure interface xe0. |
SW2(config-if)#switchport | Configure the interface as switch port. |
SW2(config-if)#bridge-group 1 | Configure interface in bridge group 1. |
SW2(config-if)#switchport mode trunk | Configure interface mode as trunk. |
SW2(config-if)#switchport trunk allowed vlan all | Allow all VLANs on interface xe1. |
SW2(config-if)#exit | Exit the interface mode |
SW2(config)#commit | Commit the configuration |
SW2(config)#exit | Exit the configure terminal mode |
SW3
SW3#configure terminal | Enter configure mode. |
SW3(config)#bridge 1 protocol rstp vlan-bridge | Create bridge 1 as an RSTP VLAN-aware bridge. |
SW3(config)#vlan database | Entering vlan database |
SW3(config-vlan)#vlan 512 bridge 1 state enable | Create VLAN 512 on bridge 1. |
SW3(config-vlan)#exit | Exit vlan database |
SW3(config)#interface xe17 | Configure interface xe17 |
SW3(config-if)#switchport | Configure the interface as switch port. |
SW3(config-if)#bridge-group 1 | Configure interface in bridge group 1. |
SW3(config-if)#switchport mode trunk | Configure interface mode as trunk. |
SW3(config-if)#switchport trunk allowed vlan all | Allow all VLANs on interface xe17. |
SW3(config-if)#exit | Exit config mode. |
SW3(config)#interface xe1 | Configure interface xe1. |
SW3(config-if)#switchport | Configure the interface as switch port. |
SW3(config-if)#bridge-group 1 | Configure interface in bridge group 1. |
SW3(config-if)#switchport mode trunk | Configure interface mode as trunk. |
SW3(config-if)#switchport trunk allowed vlan all | Allow all VLANs on interface xe1. |
SW3(config-if)#exit | Exit the interface mode |
SW3(config)#commit | Commit the configuration |
SW3(config)#exit | Exit the configure terminal mode |
SW4
SW4#configure terminal | Enter configure mode. |
SW4(config)#bridge 1 protocol rstp vlan-bridge | Create bridge 1 as an RSTP VLAN-aware bridge. |
SW4(config)#vlan database | Entering vlan database |
SW4(config-vlan)#vlan 512 bridge 1 state enable | Create VLAN 512 on bridge 1. |
SW4(config-vlan)#exit | Exit vlan database |
SW4(config)#interface xe1 | Configure interface xe1. |
SW4(config-if)#switchport | Configure the interface as switch port. |
SW4(config-if)#bridge-group 1 | Configure interface in bridge group 1. |
SW4(config-if)#switchport mode trunk | Configure interface mode as trunk. |
SW4(config-if)#switchport trunk allowed vlan all | Allow all VLANs on interface xe1. |
SW4(config-if)#exit | Exit config mode. |
SW4(config)#interface xe9 | Configure interface xe9. |
SW4(config-if)#switchport | Configure the interface as switch port. |
SW4(config-if)#bridge-group 1 | Configure interface in bridge group 1. |
SW4(config-if)#switchport mode trunk | Configure interface mode as trunk. |
SW4(config-if)#switchport trunk allowed vlan all | Allow all VLANs on interface xe9. |
SW4(config-if)#exit | Exit the interface mode |
SW4(config)#commit | Commit the configuration |
SW4(config)#exit | Exit the configure terminal mode |
SW5
SW5#configure terminal | Enter configure mode. |
SW5(config)#bridge 1 protocol rstp vlan-bridge | Create bridge 1 as an RSTP VLAN-aware bridge. |
SW5(config)#vlan database | Entering vlan database |
SW5(config-vlan)#vlan 512 bridge 1 state enable | Create VLAN 512 on bridge 1. |
SW5(config-vlan)#exit | Exit vlan database |
SW5(config)#interface xe9 | Configure interface xe9. |
SW5(config-if)#switchport | Configure the interface as switch port. |
SW5(config-if)#bridge-group 1 | Configure interface in bridge group 1. |
SW5(config-if)#switchport mode trunk | Configure interface mode as trunk. |
SW5(config-if)#switchport trunk allowed vlan all | Allow all VLANs on interface xe9. |
SW5(config-if)#exit | Exit config mode. |
SW5(config)#ethernet cfm domain-type character-string domain-name mdnam level 7 mip-creation default | Create cfm domain with type as character string and set mip creation criteria to default. |
SW5(config-ether-cfm)#service ma-type string ma-name testtm | Create ma type as string and set mip creation criteria to default. |
SW5(config-ether-cfm-ma)#vlan 25 bridge 1 | Configure vlan-id to associate the vlan to the MA |
SW5(config-ether-cfm-ma)#mip-creation default | Set the mip creation criteria to default for the MA |
SW5(config-ether-cfm-ma)#ethernet cfm mep down mpid 1 active true xe9 | Create down mep on xe9. |
SW5(config-ether-cfm-ma-mep)#cc multicast state enable | Enable cc multicast. |
SW5(config-ether-cfm-ma-mep)#exit-ether-ma- mep-mode | Exit CFM MEP configuration mode |
SW5(config-ether-cfm-ma)#mep crosscheck mpid 2 | Configure crosscheck to remote MEP in VLAN 512. |
SW5(config-ether-cfm-ma)#cc interval 10ms | Enable cc interval for 10 millisecond. |
SW5(config-ether-cfm-ma)#exit-ether-ma-mode | Exit CFM MA configuration mode. |
SW5(config-ether-cfm)#exit | Exit ethernet CFM mode. |
SW5(config)#commit | Commit the configuration |
SW5(config)#exit | Exit the configure terminal mode |
Validation
SW1#ping ethernet mac 3c2c.9926.e683 unicast source 2 domain mdnam vlan 512 bridge 1
success rate is 100 (5/5)
SW1#traceroute ethernet 3c2c.9926.e683 mepid 2 domain mdnam
MP Mac Hops Relay-action Ingress/Egress Ingress/Egress action
3c2c.9926.e683 1 RlyHit Ingress IngOK
SW1#show ethernet cfm maintenance-points local mep domain mdnam ma-name testtm
MPID Dir Lvl VLAN CC-Stat HW-Status CC-Intvl MAC-Address Def Port MD Name
------------------------------------------------------------------------------
--
2 Dn 7 512 Enable Installed 10 ms 6cb9.c567.721d F ce49 mdnam
SW1#show ethernet cfm maintenance-points remote domain mdnam ma-name testtm MEPID RMEPID LEVEL VLAN Rx CCM RDI PEER-MAC TYPE
------------------------------------------------------------------------------
-2 1 7 512 Yes False 3c2c.9926.e683 Configured
SW1#show ethernet cfm ma status domain mdnam ma testtm
MA NAME VLAN STATUS
-------------------------------------------
testtm 512 Active