Cross-Connect MLAG Topology Configuration Example

In the following example:
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Cross-Connect MLAG Topology

Controlling Bridge 1 (FA Proxy CB1)

# show lldp ports 125:9 neighbors detailed 

-----------------------------------------------------------------------------
LLDP Port 125:9 detected 1 neighbor
  Neighbor: 00:04:96:9D:42:32/15, age 3 seconds
   - Chassis ID type: MAC address (4)
      Chassis ID     : 00:04:96:9D:42:32
    - Port ID type: ifName (5)
      Port ID     : "15"
    - Time To Live: 120 seconds
    - System Name: "X690-48t-2q-4c"
    - System Description: "ExtremeXOS (X690-48t-2q-4c) version 30.5.0.257 30\
                           .5.0.257 by release-manager on Mon Nov 4 22:39:20\
                            EST 2019"
    - Avaya/Extreme Fabric Attach element
      Element Type   : 5
      State          : 0
      Management Vlan: 0
      SystemId       : 00:04:96:9d:42:32
      Link Info      : 00-01-00-0f
# show fabric attach assignments 
Fabric Attach Mode: Proxy
Port     VLAN  VLAN Name                         Type     ISID/NSI  Status
-------  ----  --------------------------------  -------  --------  --------
125:5     100  SYS_VLAN_0100                     Dynamic   2800100  Active  
125:5     101  SYS_VLAN_0101                     Dynamic   2800101  Active  
(pacman debug) Slot-1 VPEX CB1-465.12 # show fabric attach elements 
Fabric Attach Mode: Proxy
                                                       Mgmt     Auto
System Id                     Port    Type             VLAN Tag Provision
----------------------------- ------- ---------------- ---- --- --------------
00-04-96-9d-42-32-00-01-00-1f 1:1     Proxy (No Auth)  None Mix Disabled      
00-04-96-9a-8d-6c-00-01-00-0f 1:25    Server (No Auth) None Mix Disabled      
00-04-96-9c-d4-5a-00-01-00-12 1:26    Server (No Auth) None Mix Disabled      
00-04-96-9a-8d-45-00-01-00-2f 1:27    Proxy (No Auth)  None Mix Disabled      
00-04-96-98-a9-1a-00-01-00-11 125:5   Switch           None Mix Disabled      
00-04-96-9d-42-32-00-01-00-0f 125:9   Proxy (No Auth)  None Mix Disabled      
# show vlan 100 | include Tag
VLAN 100: show vlan SYS_VLAN_0100 | include Tag
    Admin State:         Enabled     Tagging:   802.1Q Tag 100 
       Tag:   *125:5F,*1:27gF,*1:25gGF
                  (x) VMAN Tag Translated port
(pacman debug) Slot-1 VPEX CB1-465.14 #
(pacman debug) Slot-1 VPEX CB1-465.26 # show mlag ports 

                Local                                             Local   Remote 
MLAG    Local   Link     Remote                           Peer    Fail    Fail   
Id      Port    State    Link    Peer                     Status  Count   Count  
================================================================================ 
20      1:25    A        Up      right-peer               Up          0       0
10      1:28    A        Up      right-peer               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,
                  Virtual - MLAG peer switch does not have physical port.

Number of Multi-switch Link Aggregation Groups  : 2
Convergence control                             : Conserve Access Lists
Reload Delay Interval                           : 30 seconds
Reload Delay                                    : Disabled
Link Up Isolation                               : Off
27 # show mlag peer 
Multi-switch Link Aggregation Peers:

MLAG Peer         : right-peer
VLAN              : isc                    Virtual Router    : VR-Default  
Local IP Address  : 45.0.0.1               Peer IP Address   : 45.0.0.2    
MLAG ports        : 2                      Tx-Interval       : 1000 ms
Checkpoint Status : Up                     Peer Tx-Interval  : 1000 ms
Rx-Hellos         : 18771                  Tx-Hellos         : 18772       
Rx-Checkpoint Msgs: 14572                  Tx-Checkpoint Msgs: 17087       
Rx-Hello Errors   : 0                      Tx-Hello Errors   : 826         
Hello Timeouts    : 1                      Checkpoint Errors : 0           
Up Time           : 0d:5h:4m:33s           Peer Conn.Failures: 1           
Local MAC         : 00:11:88:fe:f3:66      Peer MAC          : 00:04:96:9a:8d:45
Config'd LACP MAC : None                   Current LACP MAC  : 00:04:96:9a:8d:45
Authentication    : None                   

Alternate path information: None
# show sharing 
Load Sharing Monitor
Config    Current Agg     Min    Ld Share        Ld Share  Agg Link  Link Up
Master    Master  Control Active Algorithm Flags Group     Mbr State Transitions
================================================================================
  1:25   1:25     LACP       1    L2        A     1:25      Y     A       0
                                  L2              1:26      Y     A       0
  1:27   1:27     LACP       1    L2        A     1:27      Y     A       0
  1:28   1:28     LACP       1    L2        A     1:28      Y     A       0
================================================================================
Link State: A-Active, D-Disabled, R-Ready, NP-Port not present, L-Loopback
Minimum Active: (<) Group is down. # active links less than configured minimum
Load Sharing Algorithm: (L2) Layer 2 address based, (L3) Layer 3 address based
                        (L3_L4) Layer 3 address and Layer 4 port based
                        (custom) User-selected address-based configuration
Custom Algorithm Configuration: ipv4 L3-and-L4, xor
Custom Hash Seed: Switch MAC address (0x88FEF366)
Flags:
    A - All: Distribute to all members,
    d - Dynamically created shared port,
    L - Local Slot: Distribute to members local to ingress slot,
    P - Port Lists: Distribute to per-slot configurable subset of members,
    R - Resilient Hashing enabled.
Number of load sharing trunks: 3
# show configuration vsm 
#
# Module vsm configuration.
#
create mlag peer "right-peer" 
configure mlag peer "right-peer" ipaddress 45.0.0.2 vr VR-Default 
enable mlag port 1:25 peer "right-peer" id 20 
enable mlag port 1:28 peer "right-peer" id 10 
* (pacman debug) Slot-1 VPEX CB1-465.22 # show configuration vpex 
#
# Module vpex configuration.
#
configure vpex port 1:28 slot 125
configure vpex ring rebalancing off
* (pacman debug) Slot-1 VPEX CB1-465.23 # 
* (pacman debug) Slot-1 VPEX CB1-465.23 # show vpex topology 

Topology: Cascade
  Native cascade port 1:28     
    Slots: 125

Controlling Bridge1 (FA Proxy CB2)

# show fabric attach elements 
Fabric Attach Mode: Proxy
                                                       Mgmt     Auto
System Id                     Port    Type             VLAN Tag Provision
----------------------------- ------- ---------------- ---- --- --------------
00-04-96-9a-8d-6c-00-01-00-21 1:16    Server (No Auth) None Mix Disabled      
00-04-96-9c-d4-5a-00-01-00-05 1:24    Server (No Auth) None Mix Disabled      
00-04-96-99-9e-31-00-01-00-33 1:33    Switch           None Mix Disabled      
00-11-88-fe-f3-66-00-01-00-1b 1:47    Proxy (No Auth)  None Mix Disabled      
00-04-96-98-a9-1a-00-01-00-11 125:5   Switch           None Mix Disabled      
00-04-96-9d-42-32-00-01-00-0f 125:9   Proxy (No Auth)  None Mix Disabled      
(pacman debug) Slot-1 VPEX CB2-670.2 # show fabric attach assignments 
Fabric Attach Mode: Proxy
Port     VLAN  VLAN Name                         Type     ISID/NSI  Status
-------  ----  --------------------------------  -------  --------  --------
125:5     100  SYS_VLAN_0100                     Dynamic   2800100  Active  
125:5     101  SYS_VLAN_0101                     Dynamic   2800101  Active  
(pacman debug) Slot-1 VPEX CB2-670.3 # 
(pacman debug) Slot-1 VPEX CB2-670.3 # show lldp ports 125:5 neighbors detailed 

-----------------------------------------------------------------------------
LLDP Port 125:5 detected 1 neighbor
  Neighbor: 00:04:96:98:A9:1A/17, age 18 seconds
    - Chassis ID type: MAC address (4)
      Chassis ID     : 00:04:96:98:A9:1A
    - Port ID type: ifName (5)
      Port ID     : "17"
    - Time To Live: 120 seconds
    - System Name: "FAClient-450G2"
    - System Description: "ExtremeXOS (X450G2-24t-G4) version 30.4.0.524 30.\
                           4.0.524 by release-manager on Fri Oct 25 15:01:31\
                            EDT 2019"
    - Avaya/Extreme Fabric Attach element
      Element Type   : 8
      State          : 0
      Management Vlan: 0
      SystemId       : 00:04:96:98:a9:1a
      Link Info      : 00-01-00-11

    - Extreme Fabric Attach NSI(I-SID)