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TRAFFIC ONLY GOING THROUGH ONE LINK IN LAG SETUP

TRAFFIC ONLY GOING THROUGH ONE LINK IN LAG SETUP

ola
New Contributor

Please i need a suggestion or an advice on what could be the issue ,
I have an extreme switch connecting to a juniper SRX Firewall through a LAG (5 interface lag together) connection .
Then recently i noticed out of the LAG only one of the link is picking traffic while others are not doing anything . what could be the problem ? as my traffic is expected to grow as we get into festive period.

Below show command for reference on the extreme switch BD-8810

ola_0-1669799134607.pngola_1-1669799172529.png

ola_5-1669799403232.png

chassis cluster configuration on the firewall

show configuration |match redundancy| display set
set chassis cluster redundancy-group 0 node 0 priority 250
set chassis cluster redundancy-group 0 node 1 priority 100
set chassis cluster redundancy-group 1 node 0 priority 250
set chassis cluster redundancy-group 1 node 1 priority 100
set chassis cluster redundancy-group 1 preempt
set chassis cluster redundancy-group 1 interface-monitor xe-7/2/0 weight 255
set chassis cluster redundancy-group 1 interface-monitor xe-19/2/0 weight 255
set chassis cluster redundancy-group 1 interface-monitor xe-7/2/1 weight 255
set chassis cluster redundancy-group 1 interface-monitor xe-19/2/1 weight 255
set chassis cluster redundancy-group 1 interface-monitor xe-7/2/2 weight 255
set chassis cluster redundancy-group 1 interface-monitor xe-7/2/3 weight 255
set chassis cluster redundancy-group 1 interface-monitor xe-19/2/2 weight 255
set chassis cluster redundancy-group 1 interface-monitor xe-19/2/3 weight 255
set chassis cluster redundancy-group 1 interface-monitor xe-7/2/4 weight 255
set chassis cluster redundancy-group 1 interface-monitor xe-19/2/4 weight 255
set interfaces reth0 redundant-ether-options redundancy-group 1

1 REPLY 1

Ludovico_Steven
Extreme Employee

On the ERS side, an MLT/LAG by default does L2 MAC based hashing. Which can be sub-optimal if the ERS is connected to a router, towards which all traffic uses the same MAC.

You can make ERS do L3 IP based hashing on the MLT/LAG, but you need to set "load-balance advanced" on the MLT group.

GTM-P2G8KFN