Below is an example of how to configure an MLAG (Multi-switch Link Aggregation Group). Simple MLAG Configuration shows a finished MLAG network.
Description: The ISC provides an out-of-band IP communications path between the two MLAG peer switches to exchange keep-alive packets and to checkpoint various state information between switches.
On the “Left” BlackDiamond 8800 switch:
enable sharing 2:1 group 2:1,3:1 create vlan isc config vlan isc tag 3000 config vlan isc add port 2:1 tag config vlan isc ipaddress 1.1.1.1/24
On the “Right” BlackDiamond 8800 switch:
enable sharing 2:1 group 2:1,3:1 create vlan isc config vlan isc tag 3000 config vlan isc add port 2:1 tag config vlan isc ipaddress 1.1.1.2/24
Description: By creating an MLAG peer you associate a peer name that can be associated with the peer switch's IP address and other peer configuration properties. The peer is then bound to each individual MLAG port group.
On the “left” BlackDiamond 8800 switch:
create mlag peer "rightBD8K" config mlag peer “rightBD8K” ipaddress 1.1.1.2
On the “right” BlackDiamond 8800 switch:
create mlag peer “leftBD8K” config mlag peer "leftBD8K" ipaddress 1.1.1.1
Description: Creates an MLAG port group by specifying the local switch's port, the MLAG peer switch, and an "mlag-id" which is used to reference the corresponding port on the MLAG peer switch. The specified local switch's port can be either a single port or a load share master port.
On the “left” BlackDiamond 8800 switch:
enable mlag port 1:1 peer "rightBD8K" id 1 enable mlag port 1:2 peer "rightBD8K" id 2
On the “right” BlackDiamond 8800 switch:
enable mlag port 1:2 peer "leftBD8K" id 1 enable mlag port 1:1 peer "leftBD8K" id 2
Description: After MLAG groups are configured, you can verify the connections via the show mlag peer and show mlag ports commands. Be sure to note the peer status, the Local Link State, and the Remote Link status.
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Download EPUBBD-8810.5 # show mlag peer
Multi-switch Link Aggregation Peers:
MLAG Peer : leftBD8k
VLAN : isc Virtual Router : VR-Default
Local IP Address : 1.1.1.2 Peer IP Address : 1.1.1.1
MLAG ports : 2 Tx-Interval : 1000 ms
Checkpoint Status : Up Peer Tx-Interval : 1000 ms
Rx-Hellos : 184 Tx-Hellos : 184
Rx-Checkpoint Msgs: 12 Tx-Checkpoint Msgs: 12
Rx-Hello Errors : 0 Tx-Hello Errors : 0
Hello Timeouts : 1 Checkpoint Errors : 0
Up Time : 0d:0h:0m:10s Peer Conn.Failures: 1
BD-8810.3 # show mlag ports
Local
Local Remote
MLAG Local Link Remote Peer Fail Fail
Id Port State Link Peer Status Count Count
=========================================================================
1 1:1 A Up rightBD8K Up 0 0
2 1:2 A Up rightBD8K Up 0 0
=========================================================================
Local Link State: A - Active, D - Disabled, R - Ready, NP - Port not present
Remote Link : Up - One or more links are active on the remote switch,
Down - No links are active on the remote switch,
N/A - The peer has not communicated link state for this MLAG port
Number of Multi-switch Link Aggregation Groups : 2
Convergence control : Fast
BD-8810.3 # show mlag peer
Multi-switch Link Aggregation Peers:
MLAG Peer : rightBD8k
VLAN : isc Virtual Router : VR-Default
Local IP Address : 1.1.1.1 Peer IP Address : 1.1.1.2
MLAG ports : 2 Tx-Interval : 1000 ms
Checkpoint Status : Up Peer Tx-Interval : 1000 ms
Rx-Hellos : 167 Tx-Hellos : 167
Rx-Checkpoint Msgs: 12 Tx-Checkpoint Msgs: 12
Rx-Hello Errors : 0 Tx-Hello Errors : 0
Hello Timeouts : 1 Checkpoint Errors : 0
Up Time : 0d:0h:0m:7s Peer Conn.Failures: 1
BD-8810.5 # show mlag ports
Local Local Remote
MLAG Local Link Remote Peer Fail FailId
Port State Link Peer Status Count Count
================================================================================
2 1:1 A Up leftBD8K Up 0 0
1 1:2 A Up leftBD8K Up 0 0
================================================================================
Local Link State: A - Active, D - Disabled, R - Ready, NP - Port not present
Remote Link : Up - One or more links are active on the remote switch,
Down - No links are active on the remote switch,
N/A - The peer has not communicated link state for this MLAGport
Number of Multi-switch Link Aggregation Groups : 2
Convergence control : Fast
Description: The ISC port must be added as a member port for any VLAN that has MLAG member ports.
create vlan "xyz"
On the “left” BlackDiamond 8800 switch:
configure vlan "xyz" add port 1:1, 2:1 tagged
On the “right” BlackDiamond 8800 switch:
configure vlan "xyz" add port 1:2, 2:1 tagged
Simple MLAG Configuration, shows a basic MLAG network. Two-tier MLAG Network shows a network with back-to-back aggregation. There is one MLAG configured on the BlackDiamond switches and three configured on the Summit switches.
