Configure Nortel Switch 5510 for LACP with Cisco LACP

For Nortel/Baystack, you can use LACP with 802.1Q to connect with Cisco LACP.

Here is the configuration example.

BayStack 470 (Port 18-19 LACP) <--> Cisco 3550
( port 0/18 - 0/19)
VLANs 10 and 20 will be tagged across the LAG (Link Aggregation Group)
LACP key = 3
MLT ID = 2
LACP Timeout = Long

For BayStack 470,
470-48T(config)#vlan members remove 1 ALL
470-48T(config)#vlan ports 18,19 tagging tagall
470-48T(config)# vlan create 10 type port
470-48T(config)#vlan create 20 type port
470-48T(config)# vlan members add 10 18-20
470-48T(config)#vlan members add 20 18-20
470-48T(config)# interface fastEthernet all
470-48T(config-if)#no spanning-tree port 18,19 stp 1
470-48T(config-if)# lacp key port 18,19 3
470-48T(config-if)# lacp mode port 18,19 active
470-48T(config-if)# lacp aggregation port 18,19 enable
470-48T(config-if)# exit

For Cisco 3550,

Add VLANs 10 and 20
C3550#vlan data
C3550(vlan)#vlan 10 state active
C3550(vlan)#vlan 20 state active
C3550(vlan)#exit

!
spanning-tree mode pvst
spanning-tree extend system-id
no spanning-tree vlan 2,4,10,20
spanning-tree vlan 4,100-102 priority 8192
!
vlan dot1q tag native
!
interface Port-channel3
switchport trunk encapsulation dot1q
switchport trunk native vlan 10
switchport trunk allowed vlan 10,20
switchport mode trunk
!
!
interface FastEthernet0/18
switchport trunk encapsulation dot1q
switchport trunk native vlan 10
switchport trunk allowed vlan 10,20
switchport mode trunk
channel-group 3 mode active
channel-protocol lacp
!
interface FastEthernet0/19
switchport trunk encapsulation dot1q
switchport trunk native vlan 10
switchport trunk allowed vlan 10,20
switchport mode trunk
channel-group 3 mode active
channel-protocol lacp
!
interface FastEthernet0/20
switchport access vlan 10
switchport mode access


Thats It.