LACP ports from B3 vs B5 Enterasys Switch

[Mark_Robinson]

Is there a difference between these two switches when configuring LACP? We replaced a B3 with a B5 switch with identical configuration and the LACP ports appeared to create a loop. The only difference between these two units (besides model) would be the B5 had a newer firmware 06.81.04.0001. Any suggestions would be appreciated.

[Paulo_Silva]

Hi Mark.

One question, wich vlan are configured the ports ge.1.46-48? Another question did you configure in both switches "set lacp singleportlag enable"?

Regards,

Paulo Mauricio

[Daniel_Coughlin]

Mark,

The short answer is that they should be almost identical. Depending on what has changed in firmware of course.

Can you post the lacp and port configurations from each?
show port status for the lag port and underlying physical ports
show lacp lag.0.x
show lacp groups

[Mark_Robinson]

Thanks. Here is the lacp and port configs on the existing B3 switch which match the new B5 switch.

set lacp aadminkey lag.0.1 10

set port lacp port ge.1.46 aadminkey 10

set port lacp port ge.1.47 aadminkey 10

set port lacp port ge.1.48 aadminkey 10

set port vlan ge.1.1-45 520

Port Status
ge.1.1 Down Up N/A N/A BaseT RJ45
ge.1.2 Up Up 100.0M full BaseT RJ45
ge.1.3 Up Up 100.0M full BaseT RJ45
ge.1.4 Up Up 100.0M full BaseT RJ45
ge.1.5 Up Up 100.0M full BaseT RJ45
ge.1.6 Up Up 100.0M full BaseT RJ45
ge.1.7 Up Up 100.0M full BaseT RJ45
ge.1.8 Up Up 100.0M full BaseT RJ45
ge.1.9 Up Up 10.0M half BaseT RJ45
ge.1.10 Up Up 10.0M half BaseT RJ45
ge.1.11 Up Up 10.0M half BaseT RJ45
ge.1.12 Up Up 10.0M half BaseT RJ45
ge.1.13 Up Up 10.0M half BaseT RJ45
ge.1.14 Up Up 10.0M half BaseT RJ45
ge.1.15 Up Up 10.0M half BaseT RJ45
ge.1.16 Up Up 10.0M half BaseT RJ45
ge.1.17 Up Up 10.0M half BaseT RJ45
ge.1.18 Down Up N/A N/A BaseT RJ45
ge.1.19 Down Up N/A N/A BaseT RJ45
ge.1.20 Down Up N/A N/A BaseT RJ45
ge.1.21 Down Up N/A N/A BaseT RJ45
ge.1.22 Down Up N/A N/A BaseT RJ45
ge.1.23 Down Up N/A N/A BaseT RJ45
ge.1.24 Down Up N/A N/A BaseT RJ45
ge.1.25 Down Up N/A N/A BaseT RJ45
ge.1.26 Down Up N/A N/A BaseT RJ45
ge.1.27 Down Up N/A N/A BaseT RJ45
ge.1.28 Down Up N/A N/A BaseT RJ45
ge.1.29 Down Up N/A N/A BaseT RJ45
ge.1.30 Down Up N/A N/A BaseT RJ45
ge.1.31 Down Up N/A N/A BaseT RJ45
ge.1.32 Down Up N/A N/A BaseT RJ45
ge.1.33 Down Up N/A N/A BaseT RJ45
ge.1.34 Down Up N/A N/A BaseT RJ45
ge.1.35 Down Up N/A N/A BaseT RJ45
ge.1.36 Down Up N/A N/A BaseT RJ45
ge.1.37 Down Up N/A N/A BaseT RJ45
ge.1.38 Down Up N/A N/A BaseT RJ45
ge.1.39 Down Up N/A N/A BaseT RJ45
ge.1.40 Down Up N/A N/A BaseT RJ45
ge.1.41 Down Up N/A N/A BaseT RJ45
ge.1.42 Down Up N/A N/A BaseT RJ45
ge.1.43 Down Up N/A N/A BaseT RJ45
ge.1.44 Down Up N/A N/A BaseT RJ45
ge.1.45 Down Up N/A N/A Combo RJ45/SFP
ge.1.46 dormant Up 1.0G full Combo RJ45/SFP
ge.1.47 dormant Up 1.0G full Combo RJ45/SFP
ge.1.48 dormant Up 1.0G full Combo RJ45/SFP
lag.0.1 Up Up 3.0G full lag
lag.0.2 Down Up lag
lag.0.3 Down Up lag
lag.0.4 Down Up lag
lag.0.5 Down Up lag
lag.0.6 Down Up lag

B3(su)->show lacp lag.0.1
Global Link Aggregation state: enabled
Single Port LAGs: disabled

Aggregator: lag.0.1
Actor Partner
System Identifier: 00:1F:45:44:8B:28 00:1F:45:9E:72:FC
System Priority: 32768 32768
Admin Key: 10
Oper Key: 10 10
Attached Ports: ge.1.46
ge.1.47
ge.1.48

B3(su)->show lacp groups
LACP groups supported 6

As stated earlier, the B5 config file matches this B3 identically. When the B5 powered up, it appeared to create a loop and started taking down other network segments. We powered down the B5 switch and all network services returned to normal.

Your thoughts are appreciated.

[Daniel_Coughlin]

and the spanning tree configuration

[Careno__Ryan]

Hello,

On B3 switches, we used to have LACP enabled by default on all ports. On B5 switches, we no longer have LACP enabled per port by default, as there were complaints about LAG groups automatically forming when two links were connected between switches.

You will need to turn on LACP on the ports with command "set port lacp port PORT_STRING enable".

Regards,
Ryan Careno
Extreme Networks GTAC