05-10-2020 09:48 AM
Hi,
i hope someone can help me with the issue i'm facing
i have the following scenario
2 x CPE 2901 with HSRP groups for 4 VLANS
both are connected to a VSS 4500 Switch.
1 x CPE is connected to the first switch and the other to the second switch
i have the weird problem that if i shutdown the interface on the Switch where the cpe is connected the interface on the CPE remains UP
i have also the issue with asymetric traffic, download over cpe1 and upload over cpe2
i have to say that on the VSS i have the access switches connected with Portchannel but only the 2 CPEs are single attached
the switch has the DG pointing to the Virtual IP: 192.168.100.1
a small picture of the setup:
also on the CPE the interface attached to the Switch has 4 subinterfaces, see below:
config on CPEs with HSRP:
Gi0/0 up up Link to Customer LAN
Gi0/0.10 up up Link to Customer LAN vrf1
Gi0/0.20 up up Link to Customer LAN vrf2
Gi0/0.30 up up Link to Customer MAC vrf3
Gi0/0.40 up up Link to Mgmt
config interface on the VSS switch
interface TenGigabitEthernet1/1/4
description cpe1:Gi0/0
switchport trunk allowed vlan 10,20,30,40
switchport mode trunk
spanning-tree portfast edge trunk
end
interface TenGigabitEthernet2/1/4
description cpe2:Gi0/0
switchport trunk allowed vlan 10,20,30,40
switchport mode trunk
spanning-tree portfast edge trunk
end
can anyone help pls?
Thanks
Adam
05-10-2020 10:39 AM
Hi Adam,
In VSS environment, for things to work correctly, each CEP needs to connect to both VSS switches and not just one. So, CPE-1 to switch-1, CPE-1 to switch-2 (Po1). CPE-2 to switch-1 and CPE-2 to switch-2 (Po2).
HTH
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