Port-channel questions?

[saibaba.sagar]

Hi,

please tell me answer for below scenarios 

I want to connect two different ISP's in single bundle,

example i have link one from A-ISP, another link from B-ISP, 2-links are connected to Layer-3 Switch.

[Francesco Molino]

Hi
I'm sorry i don't get your point here.
If you have 2 isp links connected to a L3 switch, why you want to bundle them? And you can't have these 2 ports bundled into a port-channel.

Maybe you can share a quick diagram and explain what you want to achieve.

[saibaba.sagar]

HI,
thank you for quick replay...,
Please find the screen shot, as i want to use my two isp links at a time.

[Francesco Molino]

What is the link P2P between the 2 ISPs?
When you say you want to use them both at the same time, are you using any dynamic routing protocol or static?
If static, you can setup 2 default route with same AD on your switch C to get the switch to kind of load balance the traffic across the 2 ISP links.

[saibaba.sagar]

Hi,
P2P Means own fiber link, 
Yes, we are using ISIS in three switches and VPLS(VC, VSI).

Two Links i want to use at a time for load balancing.

Please suggest............

[Francesco Molino]

Ok using 2 ISPs at the same time is different than bundling them.
From switch C, for example, i believe you're connected with L3 to your ISPs, right?

1 of the simplest way to use both links for Internet, would be to have 2 default (1 per ISP) with the same AD.

[Larry Sullivan]

We are are doing this with two metros via OSPF load balancing then redistributing back into BGP.  We used to have it in a port-channel.  The reason we moved to OSPF is because if a link in the provider's cloud goes down, your port-channel interfaces will still show up and will continue to forward traffic on the bad link effectively black holing half your traffic.

[saibaba.sagar]

Hi

Hope you are doing well !

below is the actual scenario, we want to achieve load balance between A-Switch and B-Switch

i want to use C-Switch as Hub

Using VPLS l2 VPN and isis in a A & B Switches

Please help me with the configuration

[saibaba.sagar]

Hi

Hope you are doing well !

below is the actual scenario, we want to achieve load balance between A-Switch and B-Switch

i want to use C-Switch as Hub

Using VPLS l2 VPN and isis in a A & B Switches

Please help me with the configuration

[saibaba.sagar]

Hi

Hope you are doing well !

below is the actual scenario, we want to achieve load balance between A-Switch and B-Switch

i want to use C-Switch as Hub

Using VPLS l2 VPN and isis in a A & B Switches

Please help me with the configuration

[saibaba.sagar]

Hi

Hope you are doing well

below is the actual scenario

i want to achieve load balance between A-Switch and B-Switch

i want to use C-Switch as Hub

Using VPLS L2 VPN and isis in a A & B Switches

Please help me with the configuration

[saibaba.sagar]

Hi

Hope you are doing well

below is the actual scenario

i want to achieve load balance between A-Switch and B-Switch

i want to use C-Switch as Hub

Using VPLS L2 VPN and isis in a A & B Switches

Please help me with the configuration

[Michalis Milaitis · Accepted solution]

Hello Saibaba,

If you use L2 services from your ISPs you can configure MCLAG (multichassis lacp) on Location A and Location B. On Location C it's a regular port-channel.

https://community.cisco.com/t5/service-providers-documents/asr9000-xr-multichassis-lag-or-mc-lag-mclag-guide/ta-p/3133825

You should read the above document from xander. It's very detailed regarding MCLAG.  Switch-A and Switch-B will be your PoAs while Switch-C will be your DHD.

Your ISPs should forward/tunnel the lacp control frames in order to achieve this. 

[saibaba.sagar]

Thank you Brother, the document very detailed and cleared my doubts.

Please help me in MPLS, VPLS, MPLS-L2vpn MPLS L3-vpn document :-)