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Beginner

Can the 2960-X series switches support 2 up-links through 2 different ISP?

Hi Experts,

Newbies seeking specialists advise, I am having catalyst 2960-X series switch and it's been configured to bring one up-link via ISP to the remote site. Is it possible to configure for 2nd up-link through another ISP vendor for next remote location?

Appreciate in advance for help.

1 ACCEPTED SOLUTION

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VIP Mentor

Re: Can the 2960-X series switches support 2 up-links through 2 different ISP?

Hello,

 

does your switch have basic layer 3 functionality, and does it support static routes ? If so, you could use multiple static routes for unequal load balancing. The idea is to first create dummy routes for non existing IP addresses, and the use these dummy IP address in the static routes. In the example below, you have two ISPs:

 

ISP 1 192.168.1.1
ISP 2 192.168.2.1

 

You would create three static routes for non existing networks, using the ISP next hop addresses. In the example below, ISP 2 gets two static routes, and hence twice as much traffic as ISP 1:

 

ip route 10.0.1.1 255.255.255.255 192.168.1.1
ip route 10.0.2.1 255.255.255.255 192.168.2.1
ip route 10.0.2.2 255.255.255.255 192.168.2.1

 

Then, create the matching default routes using the dummy IP addresses as next hop:

 

ip route 0.0.0.0 0.0.0.0 10.0.1.1
ip route 0.0.0.0 0.0.0.0 10.0.2.1
ip route 0.0.0.0 0.0.0.0 10.0.2.2

View solution in original post

5 REPLIES 5
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VIP Mentor

Re: Can the 2960-X series switches support 2 up-links through 2 different ISP?

Hello,

 

in what context do you want to bring up a second link, as backup, or simultaneous, in a load balancing scenario ? The 2960-X has no full IP SLA support as far as I recall, but it does support EEM, which could be used in case you need some sort of active/backup functionality.

 

So, tell us more about what it is you want to achieve...

Highlighted
Beginner

Re: Can the 2960-X series switches support 2 up-links through 2 different ISP?

Hi Georg Pauwen,

Thank you for your reply.

The purpose of the second link would be simultaneously connected to a different system and maybe in different bandwidth if I am not wrong.

 

 

Highlighted
VIP Mentor

Re: Can the 2960-X series switches support 2 up-links through 2 different ISP?

Hello,

 

does your switch have basic layer 3 functionality, and does it support static routes ? If so, you could use multiple static routes for unequal load balancing. The idea is to first create dummy routes for non existing IP addresses, and the use these dummy IP address in the static routes. In the example below, you have two ISPs:

 

ISP 1 192.168.1.1
ISP 2 192.168.2.1

 

You would create three static routes for non existing networks, using the ISP next hop addresses. In the example below, ISP 2 gets two static routes, and hence twice as much traffic as ISP 1:

 

ip route 10.0.1.1 255.255.255.255 192.168.1.1
ip route 10.0.2.1 255.255.255.255 192.168.2.1
ip route 10.0.2.2 255.255.255.255 192.168.2.1

 

Then, create the matching default routes using the dummy IP addresses as next hop:

 

ip route 0.0.0.0 0.0.0.0 10.0.1.1
ip route 0.0.0.0 0.0.0.0 10.0.2.1
ip route 0.0.0.0 0.0.0.0 10.0.2.2

View solution in original post

Highlighted
Beginner

Re: Can the 2960-X series switches support 2 up-links through 2 different ISP?

Hi Georg,

I greatly appreciated your help. I hope this will work as one of the clients want to implement the above set up.

Thank you so much again.

 

Highlighted
VIP Mentor

Re: Can the 2960-X series switches support 2 up-links through 2 different ISP?

Hello

Currently does this 2960x switch directly connect to your ISP or do you have site rtr in between?

How are you providing the routing for the LAN users exteranl traffic at present?



kind regards
Paul

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