MLAG configuration

[Sulaiman_Al_Dar]

Hi,
im having a virtual lab, where i try to practice MLAG, the topology is as in the diagram

now i have a problem and some questions regarding MLAGmy problem that MLAG doesnt come up,
i have followed the following on both EXOS1 and EXOS2 switches
EXOS1
configure vlan default delete ports all
configure vr VR-Default delete ports 1-7
configure vr VR-Default add ports 1-7
configure vlan default delete ports 1-7
create vlan "ISC-VLAN"
configure vlan ISC-VLAN tag 10
create vlan "VLAN20"
configure vlan VLAN20 tag 20
enable sharing 3 grouping 3-4 algorithm roundRobin-based lacp
configure vlan ISC-VLAN add ports 3 tagged
configure vlan VLAN20 add ports 3 tagged
configure vlan ISC-VLAN ipaddress 1.1.1.1 255.255.255.252
configure vlan VLAN20 ipaddress 10.1.20.2 255.255.255.0
enable ipforwarding vlan VLAN20

create mlag peer "core"
configure mlag peer "core" ipaddress 1.1.1.2 vr VR-Default

EXOS2
configure vlan default delete ports all
configure vr VR-Default delete ports 1-7
configure vr VR-Default add ports 1-7
configure vlan default delete ports 1-7
create vlan "ISC-VLAN"
configure vlan ISC-VLAN tag 10
create vlan "VLAN20"
configure vlan VLAN20 tag 20
enable sharing 3 grouping 3-4 algorithm roundRobin-based lacp
configure vlan ISC-VLAN add ports 3 tagged
configure vlan ISC-VLAN ipaddress 1.1.1.2 255.255.255.252
configure vlan VLAN20 ipaddress 10.1.20.3 255.255.255.0
enable ipforwarding vlan VLAN20

create mlag peer "core"
configure mlag peer "core" ipaddress 1.1.1.1 vr VR-Default

Where's the output of show mlag peer on EXOS1
* EXOS01.131 # show mlag peer
Multi-switch Link Aggregation Peers:

MLAG Peer : core
VLAN : ISC-VLAN Virtual Router : VR-Default
Local IP Address : 1.1.1.1 Peer IP Address : 1.1.1.2
MLAG ports : 0 Tx-Interval : 1000 ms
Checkpoint Status : Down Peer Tx-Interval : 0 ms
Rx-Hellos : 0 Tx-Hellos : 120768
Rx-Checkpoint Msgs: 0 Tx-Checkpoint Msgs: 0
Rx-Hello Errors : 0 Tx-Hello Errors : 863
Hello Timeouts : 0 Checkpoint Errors : 0
Up Time : N/A Peer Conn.Failures: 0
Local MAC : 50:00:00:03:00:00 Peer MAC : None
Config'd LACP MAC : None Current LACP MAC : 50:00:00:03:00:00
Authentication : None


Alternate path information: None
and from EXOS2
EXOS02.42 # show mlag peer
Multi-switch Link Aggregation Peers:

MLAG Peer : core
VLAN : ISC-VLAN Virtual Router : VR-Default
Local IP Address : 1.1.1.2 Peer IP Address : 1.1.1.1
MLAG ports : 0 Tx-Interval : 1000 ms
Checkpoint Status : Down Peer Tx-Interval : 0 ms
Rx-Hellos : 0 Tx-Hellos : 118591
Rx-Checkpoint Msgs: 0 Tx-Checkpoint Msgs: 0
Rx-Hello Errors : 0 Tx-Hello Errors : 1253
Hello Timeouts : 0 Checkpoint Errors : 0
Up Time : N/A Peer Conn.Failures: 0
Local MAC : 50:00:00:04:00:00 Peer MAC : None
Config'd LACP MAC : None Current LACP MAC : 50:00:00:04:00:00
Authentication : None

Alternate path information: Nonejudging from the output i think that the Hello is not happening between the peers.

can someone advice what am I doing wrong.

also
do we need to tag all VLANs (in this case VLAN 20 ) on ISC Ports? if not, how would the failover happen.
Thanks
Sulaiman

[Tim_O_Donnell]

So, verify that your Physical is up on ports 3 and 4. Verify the sharing is up on 3 and 4. If both are up then I would look to change the algorithm of the share to L2 or L3 and see if the MLAG comes up.

Look at this as a reference:
https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-configure-MLAG-in-Extreme-switches

[Erik_Auerswald]

The MLAG peer is shown as up even without any MLAG ports configured, just as with e.g. Dell VLT or Cisco vPC.

The configuration looks OK.

Did you test IP connectivity across the ISC?

[Sulaiman_Al_Dar]

thanks for the reply,
i have tried to configure the same on both Core EXOS1 and EXOS2
here's a sample
EXOS1: enable mlag port 1 peer "core" id 1
EXOS2: enable mlag port 1 peer "core" id 1
and the lag on downstream device

enable sharing 1 grouping 1-2 algorithm roundRobin-based lacp

do i need to tag ISC VLAN on that trunk?

but usually we when i configure mlag kind of technology, like Dell VLT and cisco vPC, once we config is complete, without configuring the MLAG ports, (which are connected to downstream device) the status shows as up.

is it different on EXOS?
sorry if that seem naive, but im totally new to Extreme switches.
Thanks
Sulaiman

[Tomasz]

Good point, when LACP is running on one side, it expects it be running on the other end.