Here is a small introduction to Alcatel AOS with some examples.

Factory Reset

This does not remove users, passwords and stack configuration, to remove users and passwords, you must delete the UserTable2 file

delete working/boot.cfg
delete certified/boot.cfg
reload (or unplug)

Default Login

  • Login : admin
  • Password : switch

Spanning Tree

Some sample commands

-> show spantree ports active
Vlan  Port  Oper Status  Path Cost  Role   Loop Guard   Note
-----+------+------------+---------+-------+-----------+---------
1  1/1        BLK             4    ALT         DIS
1  1/2       FORW             4   ROOT         DIS
1  1/3       FORW             4   DESG         DIS
1  1/48      FORW            19   DESG         DIS

-> show spantree 1
Spanning Tree Parameters for Vlan 1
Spanning Tree Status :                   ON,
Protocol             :       IEEE Rapid STP,
mode                 : 1X1 (1 STP per Vlan),
Priority             :       32768 (0x8000),
Bridge ID            :   8000-00:e0:b1:81:fe:b6,
Designated Root      :   0010-00:e0:b1:aa:fe:d8,
Cost to Root Bridge  :                    4,
Root Port            :   Slot 1 Interface 2,
Next Best Root Cost  :                    4,
Next Best Root Port  :   Slot 1 Interface 1,
TxHoldCount          :                    3,
Topology Changes     :                    7,
Topology age         :            00:05:13,
Current Parameters (seconds)
Max Age              =    20,
Forward Delay        =    15,
Hello Time           =     2
Parameters system uses when attempting to become root
System Max Age       =    20,
System Forward Delay =    15,
System Hello Time    =     2

-> bridge 1 protocol rstp
-> bridge 1 priority 16

(Yes.. sometime it’s bridge, sometime its spantree and debug commands are “stp”… Nothing coherent !)

Root Guard

Root guard on port 8/1 vlan 100

bridge 1x1 100 8/1 restricted-role enable

Creating a LAG does not create a logical interface (like on Cisco/Juniper/HP), the first physical interface of the LAG become the “Primary Port”, if 1/1 and 1/2 are on the same lag, even if you unplug 1/1, you could see it as root port on STP because 1/2 is still part of the LAG and is up (and is the primary port)

-> show linkagg 1

Static Aggregate
SNMP Id                  : 40000001,
Aggregate Number         : 1,
SNMP Descriptor          : Omnichannel Aggregate Number 1 ref 40000001 size 2,
Name                     : TOP-MIDDLE,
Admin State              : ENABLED,
Operational State        : UP,
Aggregate Size           : 2,
Aggregate Min-Size       : 1,
Number of Selected Ports : 2,
Number of Reserved Ports : 2,
Number of Attached Ports : 2,
Primary Port             : 1/1

-> show linkagg 1 port

Slot/Port Aggregate SNMP Id   Status   Agg  Oper Link Prim Standby
---------+---------+-------+----------+----+----+----+----+-------
1/1    Static      1001  ATTACHED     1  UP   UP   YES  NO
1/2    Static      1002  ATTACHED     1  UP   UP   NO   NO

-> static linkagg 1 size 2 admin state enable
-> static linkagg 1 name "TOP-MIDDLE"
-> static linkagg 2 size 2 admin state enable
-> static linkagg 2 name "TOP-BOTTOM"
-> static agg 1/1 agg num 1
-> static agg 1/2 agg num 1
-> static agg 1/3 agg num 2
-> static agg 1/4 agg num 2