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Switch between two routers

Posted on 2013-05-29
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Last Modified: 2013-06-20
Hi all,

I have cisco router connected to cisco switch by trunk port to pass all vlans and dhcp, I want to connect second router using one port of the switch which ip should I assign to the router and what port mode should I assign to the switch to get communications between two routers

Thanks
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Question by:lexmark1
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Expert Comment

by:pergr
ID: 39206098
If you want the new router to communicate with the old router on only one VLAN, then you preferably configure the switch port as an 'access' port, for that VLAN.

If you want the new router to communicate on all VLANS (for example if you want to run HSRP) then the ports on switch and new router should be configured in the same way as for the old router.

The IP to use in the new router should be in the same subnet as the IP on the old router - on the relevant VLAN. You should also make sure that IP is not included in the DHCP pool on the old router.
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Author Comment

by:lexmark1
ID: 39207499
Hi pergr,

This is my router configuration:

Oldrouter# ip dhcp pool vlan-2
Oldrouter# network 255.255.255.0
Oldrouter# ip default 10.10.20.1
Oldrouter# interfase gig0/1.2
Oldrouter# ip add 10.10.20.1 255.255.255.0
Oldrouter# inter gig0/1
Oldrouter# no shutdown

Connected to the switch with trunk port

Now for the new router which ip should I give and what switch port mode?

Thanks
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LVL 17

Expert Comment

by:pergr
ID: 39207533
What do you want to do with the router?
What traffic do you want to route?
Do you have a topology diagram?
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Author Comment

by:lexmark1
ID: 39210194
Hi pergr,

Please see my attachment.

Thanks
Network-Design.jpg
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Accepted Solution

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lexmark1 earned 0 total points
ID: 39237391
I solved this problem
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Author Closing Comment

by:lexmark1
ID: 39261848
My one is solved the problem
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