config etherchannel for point to point link

[prashantrecon]

for point to pint network i use privateip  and i use two link thus the config for etherchannel works

My requirement there are 2 link so can i bundled with etherchaanel

0n l3 switch(switch1)

int po1

no switchport

ip address 172.18.2.1 255.255.255.0

no shutdown

int range fa0/1-2

no switchport

switchport access valn 199

channel-group 1 mode on

on fa0/1--isp1 link

on fa0/1---isp2 link

ip route 0.0.0.0 0.0.0.0 172.18.2.2

on l3 switch(switch2)

int p01

no switchport

ip address 172.18.2.2 255.255.255.0

no shutdown

int range fa0/1-2

no switchport

switchport access vlan 22

channel-group 1 mode on

on fa0/1-isp1 link

on fa0/2-isp2 link

ip route 0.0.0.0 0.0.0.0 172.18.2.1

[Giuseppe Larosa]

Hello Prashant,

I recommend to use LACP instead of unconditional bundling it provides the capability to detect the neighbor and that is the same system connected to the other link.

You have ISP connections in the middle and so it is important to bundle in a safe way.

So I would use

channel-group 1 mode active

in order to use LACP. LACP messages are sent over every member link.

Another point of attention is that you are configuring each multilayer switch with a static default route to the other device and this is not good practice.

If you know that one site is more important you can configure the static default route on the other router, but on the main site you should configure specific static routes describing the IP subnets that are reachable at the other site.

Hope to help

Giuseppe

[prashantrecon]

Thanks for valuable suggestion.I will use lacp .

If I create svi on switch 1 such as

int vlan 21

ip add    192.168.100.1

Now on switch 2 if i give

ip route 192.168.100.0 255.255.255.0 172.18.2.1(ie p01 ip address) Thus it work.

Is my above config right ?

[Giuseppe Larosa]

Hello Prashant,

your configuration is right

yes this is what I was meaning on the main site you build specific static routes for the client IP subnets of the other site.

you can actually also use an aggregate covering multiple IP subnets with a single static route, but the idea is to avoid to have each site using a default route pointing to the other one.

Hope ot help

Giuseppe

[prashantrecon]

Thanks a lot

The think is I have implemented ether channel with in site using lan links.

But not between diffrent sites using wan links.

[Parvesh Paliwal]

can somebody come up with results ?