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Configure EIPS Intersected Rings in the Subring Mode

Network Requirements

  • Six devices in the LAN form two-level intersecting rings. Configure the EIPS sub ring mode to block the secondary port gigabitethernet0/2 on Master and secondary port gigabitethernet0/2 on sMaster to achieve the ring protection.
  • When the link between Transit1 and Transit2 is disconnected, unblock the STP blocked status for gigabitethernet0/2 on Master of the main ring to achieve data switchover and ensure the communications in Ring1 not affected.
  • When the link between sTransit1 and sTransit2 is disconnected, unblock the STP blocked status for gigabitethernet0/2 on sMaster to achieve data switchover and ensure the communications in Ring2 not affected.

Network Topology

Networking of configuring EIPS intersecting ring in the sub ring mode

Figure 3-7 Networking of configuring EIPS intersecting ring in the sub ring mode

Configuration Steps

Step 1: Configure the VLAN and port link type.

#Create VLAN2-VLAN4 on Master. Configure the link type of gigabitethernet0/1 and gigabitethernet0/2 as Trunk, permitting the services of VLAN2-VLAN4 to pass. Configure the PVID as 1.

Master#configure terminal
Master(config)#vlan 2-4
Master(config)#interface gigabitethernet 0/1-0/2
Master(config-if-range)#switchport mode trunk
Master(config-if-range)#switchport trunk allowed vlan add 2-4
Master(config-if-range)#switchport trunk pvid vlan 1

#Map VLAN2-VLAN4 on Master to the STP instance 0. Disable the STP on ports gigabitethernet0/1 and gigabitethernet0/2.

Master(config-if-range)#no spanning-tree enable
Master(config-if-range)#exit

#Create VLAN2-VLAN4 on Transit1, and map VLAN2-VLAN4 to the STP instance 0. Configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 as Trunk, permitting the services of VLAN2-VLAN4 to pass. Configure the PVID as 1. Configure the link type of port gigabitethernet0/3 as Trunk, permitting the services of VLAN3 and VLAN4 to pass. Configure the PVID as 1. Disable the STP on ports gigabitethernet0/1- gigabitethernet0/3. (Omitted)

#Create VLAN2-VLAN4 on Transit2, and map VLAN2-VLAN4 to the STP instance 0. Configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 as Trunk, permitting the services of VLAN2-VLAN4 to pass. Configure the PVID as 1. Configure the link type of port gigabitethernet0/3 as Trunk, permitting the services of VLAN3 and VLAN4 to pass. Configure the PVID as 1. Disable the STP on ports gigabitethernet0/1-gigabitethernet0/3. (Omitted)

#Create VLAN2-VLAN4 on Transit3, and map VLAN2-VLAN4 to the STP instance 0. Configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 as Trunk, permitting the services of VLAN2-VLAN4 to pass. Configure the PVID as 1. Disable the STP on ports gigabitethernet0/1 and gigabitethernet0/2. (Omitted)

#Create VLAN3 and VLAN4 on sMaster, and map VLAN3 through VLAN4 to the STP instance 0. Configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 as Trunk, permitting the services of VLAN3 and VLAN4 to pass. Configure the PVID as 1. Disable the STP on ports gigabitethernet0/1 and gigabitethernet0/2. (Omitted)

#Create VLAN3 and VLAN4 on sTransit1, and map VLAN3 and VLAN4 to the STP instance 0. Configure the link type of ports gigabitethernet0/1 and gigabitethernet0/2 as Trunk, permitting the services of VLAN3 and VLAN4 to pass. Configure the PVID as 1. Disable the STP on ports gigabitethernet0/1 and gigabitethernet0/2. (Omitted)

note


  • VLAN2 is the control VLAN for the main ring and VLAN3 is the control VLAN for the sub ring, which is only used to transfer the EIPS protocol packets. VLAN4 is the data VLAN, which is used to transfer services.
  • To enable the EIPS function, the control VLAN and data VLAN of the EIPS must be mapped to the corresponding STP instance and the STP function on the port must be disabled.
  • The control VLAN of the sub ring should be the data VLAN of the main ring.
  • When using the application scenario of the main ring intersecting the sub-ring, the EIPS mapping instance can only be configured as instance 0.

Step 2: Configure Ring1.

#Create the master node Ring1 in the sub ring mode on Master. Configure the level number of the EIPS ring as 0, domain number as 0, instance as 0, control VLAN as VLAN2, primary port as gigabitethernet0/1, and secondary port as gigabitethernet0/2. Enable the EIPS.

Master(config)#eips ring 1 master
Master(config-eips)#control vlan 2
Master(config-eips)#level 0
Master(config-eips)#domain id 1
Master(config-eips)#instance 0
Master(config-eips)#primary interface gigabitethernet 0/1
Master(config-eips)#secondary interface gigabitethernet 0/2
Master(config-eips)#eips start
Master(config-eips)#exit

#Create the transmission node Ring1 in the sub ring mode on Transit1. Configure the level number of the EIPS ring as 0, domain number as 1, instance as 0, control VLAN as VLAN2, primary port as gigabitethernet0/1, and secondary port as gigabitethernet0/2. Enable the EIPS.

Transit1(config)#eips ring 1 transit
Transit1(config-eips)#instance 0
Transit1(config-eips)#control vlan 2
Transit1(config-eips)#domain id 1
Transit1(config-eips)#level 0
Transit1(config-eips)#primary interface gigabitethernet0/1
Transit1(config-eips)#secondary interface gigabitethernet0/2
Transit1(config-eips)#eips start
Transit1(config-eips)#exit

#Create the transmission node Ring1 in the sub ring mode on Transit2. Configure the level number of the EIPS ring as 0, domain number as 1, instance as 0, control VLAN as VLAN2, primary port as gigabitethernet0/1, and secondary port as gigabitethernet0/2. Enable the EIPS.

Transit2(config)#eips ring 1 transit
Transit2(config-eips)#instance 0
Transit2(config-eips)#domain id 1
Transit2(config-eips)#control vlan 2
Transit2(config-eips)#level 0
Transit2(config-eips)#primary interface gigabitethernet0/1
Transit2(config-eips)#secondary interface gigabitethernet0/2
Transit2(config-eips)#eips start
Transit2(config-eips)#exit

#Create the transmission node Ring1 in the sub ring mode on Transit3. Configure the level number of the EIPS ring as 0, domain number as 1, instance as 0, control VLAN as VLAN2, primary port as gigabitethernet0/1, and secondary port as gigabitethernet0/2. Enable the EIPS.

Transit3(config)#eips ring 1 transit
Transit3(config-eips)#control vlan 2
Transit3(config-eips)#level 0
Transit3(config-eips)#domain id 1
Transit3(config-eips)#instance 0
Transit3(config-eips)#primary interface gigabitethernet 0/1
Transit3(config-eips)#secondary interface gigabitethernet 0/2
Transit3(config-eips)#eips start
Transit3(config-eips)#exit

Step 3: Configure Ring2.

#Create the edge node Ring2 in the sub ring mode on Transit1. Configure the level number of the EIPS ring as 0, domain number as 1, instance as 0, control VLAN as VLAN3, edge port as gigabitethernet0/3, and Ring1 as its associated transmission node. Enable the EIPS.

Transit1(config)#eips ring 2 edge
Transit1(config-eips)#control vlan 3
Transit1(config-eips)#level 1
Transit1(config-eips)#domain id 1
Transit1(config-eips)#instance 0
Transit1(config-eips)#transit ring 1
Transit1(config-eips)#edge interface gigabitethernet0/3
Transit1(config-eips)#eips start
Transit1(config-eips)#exit

#Create the edge node Ring2 in the sub ring mode on Transit2. Configure the level number of the EIPS ring as 1, domain number as 1, instance as 0, control VLAN as VLAN3, edge port as gigabitethernet0/3, and Ring1 as its associated transmission node. Enable the EIPS.

Transit2(config)#eips ring 2 assistant
Transit2(config-eips)#control vlan 3
Transit2(config-eips)#level 1
Transit2(config-eips)#domain id 1
Transit2(config-eips)#instance 0
Transit2(config-eips)#transit ring 1
Transit2(config-eips)#edge interface gigabitethernet0/3
Transit2(config-eips)#eips start
Transit2(config-eips)#exit

#Create the master node Ring2 in the sub ring mode on sMaster. Configure the level number of the EIPS ring as 1, domain number as 1, control VLAN as VLAN3, primary port as gigabitethernet0/1, and secondary port as gigabitethernet0/2. Enable the EIPS.

sMaster(config)#eips ring 2 master
sMaster(config-eips)#level 1
sMaster(config-eips)#domain id 1
sMaster(config-eips)#instance 0
sMaster(config-eips)#control vlan 3
sMaster(config-eips)#primary interface gigabitethernet 0/1
sMaster(config-eips)#secondary interface gigabitethernet 0/2
sMaster(config-eips)#eips start
sMaster(config-eips)#exit

# Create the transmission node Ring2 in the sub ring mode on sTransit1. Configure the level number of the EIPS ring as 1, domain number as 1, instance as 0, control VLAN as VLAN3, primary port as gigabitethernet0/1, and secondary port as gigabitethernet0/2. Enable the EIPS.

sTransit1(config)#eips ring 2 transit
sTransit1(config-eips)#control vlan 3
sTransit1(config-eips)#level 1
sTransit1(config-eips)#domain id 1
sTransit1(config-eips)#instance 0
sTransit1(config-eips)#primary interface gigabitethernet 0/1
sTransit1(config-eips)#secondary interface gigabitethernet 0/2
sTransit1(config-eips)#eips start
sTransit1(config-eips)#exit

Step 4:Check the result.

#Run the show eips topology-summary command on the edge node and the edge assistant node. We can view that the EIPS status of the main ring and sub rings is round and the topology information is consistent.

Transit1#show eips topology-summary 
 ring ID     : 1 
 topo status : round 
 seq host-name   mac              type       interface1   link    interface2   link   isBorder   
 ----------------------------------------------------------------------------------------------
 1   Transit2	 0001.7a22.2224   transit    gi0/1        UP      gi0/2        UP     YES        
 2   Transit3    0000.0000.008b   transit    gi0/1        UP      gi0/2        UP     NO         
 3   Master      0014.0000.1202   master     gi0/2        UP      gi0/1        UP     NO         
 4   Transit1	 0001.7a54.5d71   transit    gi0/1        UP      gi0/2        UP     YES        
 
 ring ID     : 2 
 topo status : round 
 seq host-name   mac              type       interface1   link    interface2   link   isBorder   
 ---------------------------------------------------------------------------------------------- 
 1   Transit2    0001.7a22.2224   assistant --------------------- gi0/3        UP     NO         
 2   sTransit1   2012.1209.1728   transit    gi0/2        UP      gi0/1        UP     NO         
 3   sMaster     0000.0010.0017   master     gi0/2        UP      gi0/1        UP     NO         
 4   Transit1    0001.7a54.5d71   edge       gi0/3        UP ------------------------ NO           
 
Transit2#show eips topology-summary 
 ring ID     : 1 
 topo status : round 
 seq host-name   mac              type       interface1    link    interface2   link   isBorder   
 ----------------------------------------------------------------------------------------------
 1   Transit3    0000.0000.008b   transit    gi0/1         UP      gi0/2        UP     NO         
 2   Master      0014.0000.1202   master     gi0/2         UP      gi0/1        UP     NO         
 3   Transit1	 0001.7a54.5d71   transit    gi0/1         UP      gi0/2        UP     YES        
 4   Transit2	 0001.7a22.2224   transit    gi0/1         UP      gi0/2        UP     YES        
 
 ring ID     : 2 
 topo status : round 
 seq host-name   mac              type       interface1     link   interface2   link   isBorder   
 -----------------------------------------------------------------------------------------------
 1   Transit1    0001.7a54.5d71   edge --------------------------- gi0/3        UP     NO         
 2   sMaster     0000.0010.0017   master     gi0/1          UP     gi0/2        UP     NO         
 3   sTransit1    2012.1209.1728  transit    gi0/1          UP     gi0/2        UP     NO         
 4   Transit2    0001.7a22.2224   assistant  gi0/3          UP ----------------------- NO                

#Run the show eips topology command on the edge node. We can view that gigabitethernet0/2 on Master and gigabitethernet0/2 on sMaster are blocked and the other ports are unblocked. The EIPS status of Master on the main ring and sMaster on the sub ring is COMPLETE and the EIPS status of the other ports is LINK-UP.

Transit1#show eips topology  
 ring ID     : 1 
 topo status : round 
 topo index 1 : 
        host name      : Transit2 
        eips type      : transit 
        eips status    : LINK-UP 
        border         : YES 
        base MAC	   : 0001.7a22.2224 
        sys oid......... 1.3.6.1.4.1.5651.1.0.0 
        interface1     : gi0/1 
          MAC	        : 0001.7a22.2224 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
        interface2     : gi0/2 
          MAC           : 0001.7a22.2224 
          role          : second 
          block-status  : unblock 
          link-status   : UP 
 topo index 2 : 
        host name      : Transit3 
        eips type      : transit 
        eips status    : LINK-UP 
        border         : NO 
        base MAC       : 0000.0000.008b 
        sys oid......... 1.3.6.1.4.1.5651.1.102.146 
        interface1     : gi0/1 
          MAC           : 0000.0000.008b 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
        interface2     : gi0/2 
          MAC           : 0000.0000.008b 
          role          : second 
          block-status  : unblock 
          link-status   : UP 
 topo index 3 : 
        host name      : Master 
        eips type      : master 
        eips status    : COMPLETE 
        border         : NO 
        base MAC       : 0014.0000.1202 
        sys oid        : 1.3.6.1.4.1.5651.1.102.127 
        interface1     : gi0/2 
          MAC           : 0014.0000.1202 
          role          : second 
          block-status  : block 
          link-status   : UP 
        interface2     : gi0/1 
          MAC           : 0014.0000.1202 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
 topo index 4 : 
        host name      : Transit1 
        eips type      : transit 
        eips status    : LINK-UP 
        border         : YES 
        base MAC	   : 0001.7a54.5d71 
        sys oid......... 1.3.6.1.4.1.5651.1.102.145 
        interface1     : gi0/1 
          MAC           : 0001.7a54.5d71 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
        interface2     : gi0/2 
          MAC           : 0001.7a54.5d71 
          role          : second 
          block-status  : unblock 
          link-status   : UP 
              
 ring ID     : 2 
 topo status : round 
 topo index 1 : 
        host name      : Transit2 
        eips type      : assistant 
        eips status    : LINK-UP 
        border         : NO 
        base MAC       : 0001.7a22.2224 
        sys oid......... 1.3.6.1.4.1.5651.1.0.0 
        interface2     : gi0/3 
          MAC           : 0001.7a22.2224 
          role          : edge 
          block-status  : unblock 
          link-status   : UP 
 topo index 2 : 
        host name      : sTransit1 
        eips type      : transit 
        eips status    : LINK-UP 
        border         : NO 
        base MAC       : 2012.1209.1728 
        sys oid......... 1.3.6.1.4.1.5651.1.102.126 
        interface1     : gi0/2 
          MAC           : 2012.1209.1728 
          role          : second 
          block-status  : unblock 
          link-status   : UP 
        interface2     : gi0/1 
          MAC           : 2012.1209.1728 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
 topo index 3 : 
        host name      : sMaster 
        eips type      : master 
        eips status    : COMPLETE 
        border         : NO 
        base MAC       : 0000.0010.0017 
        sys oid......... 1.3.6.1.4.1.5651.1.102.140 
        interface1     : gi0/2 
          MAC           : 0000.0010.0017 
          role          : second 
          block-status  : block 
          link-status   : UP 
        interface2     : gi0/1 
          MAC           : 0000.0010.0017 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
 topo index 4 : 
        host name      : Transit1 
        eips type      : edge 
        eips status    : LINK-UP 
        border         : NO 
        base MAC       : 0001.7a54.5d71 
        sys oid......... 1.3.6.1.4.1.5651.1.102.145 
        interface1     : gi0/3 
          MAC           : 0001.7a54.5d71 
          role          : edge 
          block-status  : unblock 
          link-status   : UP 

#When the link between Transit1 and Transit2 is disconnected, run the show eips topology command on the edge node again. We can view that the status of Ring1 changes to not round and the EIPS status of Transit1 and Transit2 changes to LINK-DOWN. The EIPS status of Master on the main ring changes to FAULT and gigabitethernet0/2 on Master changes to unblock. Transit1 communicates with Transit2 via Master, which ensures uninterrupted communications between Transit1 and Transit2. The status of Ring2 is still round, the EIPS status of sMaster is still COMPLETE, and gigabitethernet0/2 of sMaster is still blocked.

Transit1#show eips topology ring 1 
 ring ID      : 1 
 topo status  : not round 
 topo index 1 : 
        host name      : Transit2 
        eips type      : transit 
        eips status    : LINK-DOWN 
        border         : YES 
        base MAC       : 0001.7a22.2224 
        sys oid......... 1.3.6.1.4.1.5651.1.0.0 
        interface1     : gi0/1 
          MAC           : 0001.7a22.2224 
          role          : primary 
          block-status  : block 
          link-status   : DOWN 
        interface2     : gi0/2 
          MAC           : 0001.7a22.2224 
          role          : second 
          block-status  : unblock 
          link-status   : UP 
 topo index 2 : 
        host name      : Transit3 
        eips type      : transit 
        eips status    : LINK-UP 
        border         : NO 
        base MAC       : 0000.0000.008b 
        sys oid......... 1.3.6.1.4.1.5651.1.102.146 
        interface1     : gi0/1 
          MAC           : 0000.0000.008b 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
        interface2     : gi0/2 
          MAC           : 0000.0000.008b 
          role          : second 
          block-status  : unblock 
          link-status   : UP 
 topo index 3 : 
        host name      : Master 
        eips type      : master 
        eips status    : FAULT 
        border         : NO 
        base MAC       : 0014.0000.1202 
        sys oid......... 1.3.6.1.4.1.5651.1.102.127 
        interface1     : gi0/2 
          MAC           : 0014.0000.1202 
          role          : second 
          block-status  : unblock 
          link-status   : UP 
        interface2     : gi0/1 
          MAC           : 0014.0000.1202 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
 topo index 4 : 
        host name      : Transit1 
        eips type      : transit 
        eips status    : LINK-DOWN 
        border         : YES 
        base MAC       : 0001.7a54.5d71 
        sys oid......... 1.3.6.1.4.1.5651.1.102.145 
        interface1     : gi0/1 
          MAC           : 0001.7a54.5d71 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
        interface2     : gi0/2 
          MAC           : 0001.7a54.5d71 
          role          : second 
          block-status  : block 
          link-status   : DOWN 
 
Transit1#show eips topology ring 2 
 ring ID      : 2 
 topo status  : round 
 topo index 1 : 
        host name      : Transit2 
        eips type      : assistant 
        eips status    : LINK-UP 
        border         : NO 
        base MAC       : 0001.7a22.2224 
        sys oid......... 1.3.6.1.4.1.5651.1.0.0 
        interface2     : gi0/3 
          MAC           : 0001.7a22.2224 
          role          : edge 
          block-status  : unblock 
          link-status   : UP 
 topo index 2 : 
        host name      : sTransit1 
        eips type      : transit 
        eips status    : LINK-UP 
        border         : NO 
        base MAC       : 2012.1209.1728 
        sys oid......... 1.3.6.1.4.1.5651.1.102.126 
        interface1     : gi0/2 
          MAC           : 2012.1209.1728 
          role          : second 
          block-status  : unblock 
          link-status   : UP 
        interface2     : gi0/1 
          MAC           : 2012.1209.1728 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
 topo index 3 : 
        host name      : sMaster 
        eips type      : master 
        eips status    : COMPLETE 
        border         : NO 
        base MAC       : 0000.0010.0017 
        sys oid......... 1.3.6.1.4.1.5651.1.102.140 
        interface1     : gi0/2 
          MAC           : 0000.0010.0017 
          role          : second 
          block-status  : block 
          link-status   : UP 
        interface2     : gi0/1 
          MAC           : 0000.0010.0017 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
 topo index 4 : 
        host name      : Transit1 
        eips type      : edge 
        eips status    : LINK-UP 
        border         : NO 
        base MAC       : 0001.7a54.5d71 
        sys oid        : 1.3.6.1.4.1.5651.1.102.145 
        interface1     : gi0/3 
          MAC           : 0001.7a54.5d71 
          role          : edge 
          block-status  : unblock 
          link-status   : UP   

#When only the link between sTransit1 and Transit2 is disconnected, run the show eips topology command again on Transit1 and Transit2. We can view that the status of Ring2 changes to not round, the EIPS status of sMaster changes to FAULT, and gigabitethernet0/2 of sMaster changes to unblock. sTransit1 communicates with Transit2 via sMaster, which ensures uninterrupted communications between sTransit1 and Transit2. The status of Ring1 is still round, the EIPS status is still COMPLETE, and gigabitethernet0/2 on Master is still blocked.

Transit1#show eips topology ring 2 
 ring ID      : 2 
 topo status  : not round 
 topo index 1 : 
        host name      : sTransit1 
        eips type      : transit 
        eips status    : LINK-DOWN 
        border         : NO 
        base MAC       : 2012.1209.1728 
        sys oid......... 1.3.6.1.4.1.5651.1.102.126 
        interface1     : gi0/2 
          MAC           : 2012.1209.1728 
          role          : second 
          block-status  : block 
          link-status   : DOWN 
        interface2     : gi0/1 
          MAC           : 2012.1209.1728 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
 topo index 2 : 
        host name      : sMaster 
        eips type      : master 
        eips status    : FAULT 
        border         : NO 
        base MAC       : 0000.0010.0017 
        sys oid......... 1.3.6.1.4.1.5651.1.102.140 
        interface1     : gi0/2 
          MAC           : 0000.0010.0017 
          role          : second 
          block-status  : unblock 
          link-status   : UP 
        interface2     : gi0/1 
          MAC           : 0000.0010.0017 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
 topo index 3 : 
        host name      : Transit1 
        eips type      : edge 
        eips status    : LINK-UP 
        border         : NO 
        base MAC       : 0001.7a54.5d71 
        sys oid......... 1.3.6.1.4.1.5651.1.102.145 
        interface1     : gi0/3 
          MAC           : 0001.7a54.5d71 
          role          : edge 
          block-status  : unblock 
          link-status   : UP

Transit2#show eips topology ring 2 
 ring ID      : 2 
 topo status  : not round 
 topo index 1 : 
        host name      : Transit2 
        eips type      : assistant 
        eips status    : LINK-DOWN 
        border         : NO 
        base MAC       : 0001.7a22.2224 
        sys oid......... 1.3.6.1.4.1.5651.1.0.0 
        interface1     : gi0/3 
          MAC           : 0001.7a22.2224 
          role          : edge 
          block-status  : block 
          link-status   : DOWN

Transit1#show eips topology ring 1 
 ring ID     : 1 
 topo status : round 
 topo index 1 : 
        host name      : Transit2 
        eips type      : transit 
        eips status    : LINK-UP 
        border         : YES 
        base MAC       : 0001.7a22.2224 
        sys oid......... 1.3.6.1.4.1.5651.1.0.0 
        interface1     : gi0/1 
          MAC           : 0001.7a22.2224 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
        interface2     : gi0/2 
          MAC           : 0001.7a22.2224 
          role          : second 
          block-status  : unblock 
          link-status   : UP 
 topo index 2 : 
        host name      : Transit3 
        eips type      : transit 
        eips status    : LINK-UP 
        border         : NO 
        base MAC       : 0000.0000.008b 
        sys oid......... 1.3.6.1.4.1.5651.1.102.146 
        interface1     : gi0/1 
          MAC           : 0000.0000.008b 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
        interface2     : gi0/2 
          MAC           : 0000.0000.008b 
          role          : second 
          block-status  : unblock 
          link-status   : UP 
 topo index 3 : 
        host name      : Master 
        eips type      : master 
        eips status    : COMPLETE 
        border         : NO 
        base MAC       : 0014.0000.1202 
        sys oid......... 1.3.6.1.4.1.5651.1.102.127 
        interface1     : gi0/2 
          MAC           : 0014.0000.1202 
          role          : second 
          block-status  : block 
          link-status   : UP 
        interface2     : gi0/1 
          MAC           : 0014.0000.1202 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
 topo index 4 : 
        host name      : Transit1 
        eips type      : transit 
        eips status    : LINK-UP 
        border         : YES 
        base MAC       : 0001.7a54.5d71 
        sys oid......... 1.3.6.1.4.1.5651.1.102.145 
        interface1     : gi0/1 
          MAC           : 0001.7a54.5d71 
          role          : primary 
          block-status  : unblock 
          link-status   : UP 
        interface2     : gi0/2 
          MAC           : 0001.7a54.5d71 
          role          : second 
          block-status  : unblock 
          link-status   : UP