Flexnetwork 7500 bridge aggregation mixed speed port

[pificeli]

Hello,
i have a problem with a lacp bridge on my hpe flexnetwork 7510.
I would like to connect a bridge with 2 ports, one at 10 Gbit / s and one at 1Gbit / s, to a Fortigate.
The Fortigate is configured correctly and the documentation says you can do a lacp bridge with ports with different speeds.
Can I configure a bridge with ports of different speeds on my 7510?
Here is my configuration:
<centrostella> display current-configuration interface Bridge-Aggregation 510

interface Bridge-Aggregation510
description "CENTROSTELLA TO FW RM MASTER"
port link-type hybrid
port hybrid vlan 75 200 275 300 320 360 1001 to 1003 1010 tagged
port hybrid vlan 1 untagged
link-aggregation mode dynamic
lacp edge-port
#
<centrostella> display interface brief
BAGG510 UP 10G (a) F (a) H 1 "CENTROSTELLA TO FW RM MAST
XGE1 / 2/0/25 UP 10G (a) F (a) H 1 "CENTROSTELLA TO FW RM MAST
XGE1 / 2/0/26 UP 1G (a) F (a) H 1 "CENTROSTELLA TO FW RM MAST

<centrostella> display link-aggregation verbose Bridge-Aggregation 510
Aggregate Interface: Bridge-Aggregation510
Creation Mode: Manual
Aggregation Mode: Dynamic
Loadsharing Type: Shar
Management VLANs: None
System ID: 0x8000, 7848-59e1-7a00
Local:
Port Status Priority Index Oper-Key Flag
XGE1 / 2/0/25 (R) S 32768 34 19 {ACDEF}
XGE1 / 2/0/26 U 32768 35 21 {AC}
Remote:
Actor Priority Index Oper-Key SystemID Flag
XGE1 / 2/0/25 255 1 33 0xffff, e023-fff4-ebd4 {ACDEF}
XGE1 / 2/0/26 255 2 17 0xffff, e023-fff4-ebd4 {AC}

Can someone help me?
Thanks.

[akg7]

Hi,

You cannot form LACP with different speeds.

Like one is 10gig and one is 1gig. It will not form aggregation.

Thanks!

[pificeli]

ok,
Thanks for the reply.
I assumed it was so.
Thanks a lot.

[Ivan_B · Accepted solution]

Hello @pificeli !

Looking at the 'dis link-aggregation verbose' output, the XGE1/2/0/26 receives LACP PDUs from the adjacent device, but it is not elected to be Selected (Active, Forwarding) port in the BAGG510.

Check the logbuffer by 'dis logbuffer' command and look for LAGG_INACTIVE messages, I suppose you are going to see "LAGG/5/LAGG_INACTIVE_SPEED: Member port Ten-GigabitEthernet1/2/0/26 of aggregation group BAGG510 becomes INACTIVE because the port's speed is improper for being attached." If there is such message, it means it's not going to work. And there is no command to override this logic of link selection. 

My 2 cents - in overall this idea is not very wise for production network, attaching links with different throughput will lead to congestion of 1G link or under-utilization of 10G link. I've seen some platforms that allow such configuration, but it's more like an exception. The golden rule for creating LAGs is all ports must be of the same speed.

[pificeli]

Thank you very much for your valuable contribution.
Bye