02-16-2021 04:11 AM - edited 02-16-2021 05:13 AM
hi everyone.
i faced some problem about ISR router 4461 to cat 9500 Port channel problem.
1.router 1 - router 2
2. switch 1- switch 2 virtual stacking
Number of channel-groups in use: 6
Number of aggregators: 6
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
1 Po1(SD) LACP Te1/0/1(s) Te2/0/2(s)
2 Po2(SU) LACP Te1/0/2(P) Te2/0/1(P)
3 Po3(SU) LACP Te1/0/15(P) Te2/0/15(P)
4 Po4(SU) LACP Te1/0/3(P) Te2/0/3(P)
5 Po5(SD) LACP Te1/0/4(s) Te2/0/4(s)
6 Po6(RD) -
core switch - 1
interface Port-channel1
description #### Connect-to Core-R1 ###
switchport trunk allowed vlan 40,41
switchport mode trunk
interface TenGigabitEthernet2/0/2
description ### Connect to Core Router R1-port-T0/0/4 ###
switchport trunk allowed vlan 40,41
switchport mode trunk
channel-protocol lacp
channel-group 1 mode active
router -1
Number of channel-groups in use: 1
Number of aggregators: 1
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
1 Po1(RU)
RU - L3 port-channel UP State
SU - L2 port-channel UP state
P/bndl - Bundled
S/susp - Suspended
interface TenGigabitEthernet0/0/5
description ### Connect to SW2-P2/0/2 ####
no ip address
channel-group 1
end
interface Port-channel1.40
description ### Connect to R1-to-PA ####
encapsulation dot1Q 40
please find the attached file
thanks
Sk.faisal
02-17-2021 01:21 PM
Hello,
I think the command "channel-group protocol lacp" in switch side make this issue.
You can try to remove this command and specify in router side "channel-group 1 mode active/passive" or configure "mode on" in boths sides(SW/RT).
02-17-2021 01:43 PM
Hi,
It appears you are using LACP on the switch and mode "on" the router.
Use mode on or LACP on both the router and the switch and test again.
Also, ISR ports are routed ports and so, you need an SVI on the switch with IP or change the switch port from trunk to routed port with IP address on each side of the Portchannle (layer-3).
HTH
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: