Split Trunking Support with HP Auto Port Aggregation

Switch1# conf vlan 1900 create byport 1
Switch1# conf mlt 21 delete
Switch1# conf mlt 21 create
Switch1# conf mlt 21 add ports 3/6-3/7,4/6-4/7
Switch1# conf mlt 21 perform-tagging enable
Switch1# conf mlt 21 add vlan 1900
Switch1# conf vlan 1900 ip create 1.1.1.2/30
Switch1# conf mlt 21 ist create ip 1.1.1.1 vlan-id 1900
Now create the IST on Switch 2 as follows:
Switch2# conf vlan 1900 create byport 1
Switch2# conf mlt 21 delete
Switch2# conf mlt 21 create
Switch2# conf mlt 21 add ports 3/6-3/7,4/6-4/7
Switch2# conf mlt 21 perform-tagging enable
Switch2# conf mlt 21 add vlan 1900
Switch2# conf vlan 1900 ip create 1.1.1.2/30
Switch2# conf mlt 21 ist create ip 1.1.1.1 vlan-id 1900
Note: The vlan 1900 on switch 1 and switch 2 have different IP addresses.
To verify the IST configuration on each switch, enter the following command on each switch to display
the multilink trunk (MLT) information:
# show mlt info
================================================================================
Mlt Info
================================================================================
PORT SVLAN MLT MLT PORT VLAN
MLTID IFINDEX NAME TYPE TYPE ADMIN CURRENT MEMBERS IDS
--------------------------------------------------------------------------------
1 4096 p18_bl1_mlt trunk normal norm norm 1/32,1/48 10 11 12 15
2 4097 SMLT-22 access normal smlt norm 1/29 11
3 4098 Aggregate_3 access normal norm norm
4 4099 MLT-44 access normal norm norm 1/7-1/8 4044
5 4100 SMLT-11 access normal smlt norm 1/16 11
11 4106 MLT-13 access normal norm norm 3/8,4/8 13
14 4109 SMLT-14 access normal smlt norm
21 4116 MLT-21 trunk normal ist ist 3/6-3/7,4/6-4/7 1900
24 4119 Aggregate_Gig access normal smlt norm 3/2 11
25 4120 MLT-25 access normal smlt norm
MULTICAST DESIGNATED LACP LACP
MLTID IFINDEX DISTRIBUTION NT-STG PORTS ADMIN OPER
--------------------------------------------------------------------------------
1 4096 disable enable 1/32 disable down
2 4097 disable disable 1/29 disable down
3 4098 disable disable null enable down
4 4099 disable enable 1/7 disable down
5 4100 disable disable 1/16 enable down
11 4106 disable disable 3/8 disable down
14 4109 disable disable null disable down
21 4116 disable enable 3/6 disable down
24 4119 disable disable 3/2 enable up
25 4120 disable disable null enable down
Step 2: Create the SMLT on both switches. The LACP link aggregation on the switch side uses the
mlt 31. After creating the MLT, create the SMLT using the id 31. For simplicity, the key of the
LACP aggregation key is also 31.
To create the SMLT and enable LACP on it using key=31, enter the following commands on each
switch:
# conf mlt 31 create
# conf mlt 31 lacp key 31
# conf mlt 31 lacp enable
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