08-14-2012 06:02 AM - edited 03-04-2019 05:16 PM
Hi,
I am in the process to route two buildings together. Both building have the same network setup.
2 Core Switches 4506-E Chassis having glbp for layer 3 redundency on about 20 vlan in each building with default intervlan routing in place.
Below is a simple sketch of how these are connected. Blue lines are still not connected...
What I need is to setup routing onto the blue fibre links so that networks from building 1 can reach networks on building to and vias versa. I would also need to implement some sort of redundency since I have to fibre links between the 2 building.
Any help and examples would be greatly appriciated.
Thanks
Solved! Go to Solution.
08-27-2012 03:11 AM
Hi Jesmond,
did you issue the
no switchport
command before attempting to install ip? Below there is the guide for your machine...
Alessio
Jokes aside, pls mark this thread as answered
Take Care
Alessio
08-14-2012 08:54 AM
Hi Jesmond,
it's my opinion you should treat the links between the 4500s like a logical core and enabling OSPF/EIGRP on those links. A Layer 3 native routing solution has also another benefit, you can limit the broadcast domain from crossing the core links. every information which needs to pass from a building to another will be IP encapsulated and sent out.
And it would be loop-free.
Being Intervlan-routing in process you need just to advertise /30 link for each "blue fibre" you will be connecting making sure that the "no passive-interface link_interface" . Possibly you have trunks between your 4500s that allow intervlan routing. everything should be up normally.
Take Care
Alessio
08-14-2012 09:18 AM
Hi Alessio,
Thanks for the information. Since I never worked with routing, this is all new for me.
Do you have any examples of how to configure the EIGRP on this setup?
Regards,
Jesmond
08-14-2012 01:27 PM
Ok,
let's assume that we have B1=building1 and B2=building2
and that the link over the blue fibre from B1 to B2 is 10.1.2.0/30
and the other link 10.2.1.0/30
the .1 ip addresses will belong to building 1 and the .2 will belong to building 2
Router 4500_B1_A
conf t
int g0/1
description Blue fibre pointing to Building 2 on 4500B2_B
ip address 10.1.2.1 255.255.255.252
no sh
!
exit
!
router eigrp 100
no auto
network 10.1.2.0 0.0.0.3
Router 4500_B1_B
conf t
int g0/1
description Blue fibre pointing to Building 2 on 4500B2_A
ip address 10.2.1.1 255.255.255.252
no sh
!
exit
!
router eigrp 100
no auto
network 10.2.1.0 0.0.0.3
Router 4500_B2_A
conf t
int g0/2
description Blue fibre pointing to Building 1 on 4500B1_A
ip address 10.2.1.2 255.255.255.252
no sh
!
exit
!
router eigrp 100
no auto
network 10.2.1.0 0.0.0.3
Router 4500_B2_B
int g0/2
description Blue fibre pointing to Building 1 on 4500B1_B
ip address 10.1.2.2 255.255.255.252
no sh
!
exit
!
router eigrp 100
no auto
network 10.1.2.0 0.0.0.3
If i did not cross the IP this should be a good start point. keep in mind that this config is only for the blu fibre (as you defined), that means only the point to point link inter-building. it is important to understand how your inter-vlan routing is set. From what i have understood, once you change to my config example the correct AS number (EIGRP) you should be very close to your final config even if without optimisation!!!
essentially my config is to add/merge to your current EIGRP configuration
Take Care
Alessio
08-22-2012 11:17 PM
Hi Alessio,
I was trying to start working on you configuration example and I notices that you have connected as below:
B1_A to B2_B
and
B1_B to B2_A
Am I correct? If yes I have to connect the 2 blue fibres differently from as they are on the picture.
Waiting for your kind reply.
Thanks
Jesmond
08-23-2012 03:11 AM
It was just crossing the switches
conf t
int g0/1
description Blue fibre pointing to Building 2 on 4500B2_A
ip address 10.1.2.1 255.255.255.252
no sh
!
exit
!
router eigrp 100
no auto
network 10.1.2.0 0.0.0.3
Router 4500_B1_B
conf t
int g0/1
description Blue fibre pointing to Building 2 on 4500B2_B
ip address 10.2.1.1 255.255.255.252
no sh
!
exit
!
router eigrp 100
no auto
network 10.2.1.0 0.0.0.3
Router 4500_B2_A
int g0/2
description Blue fibre pointing to Building 1 on 4500B1_A
ip address 10.1.2.2 255.255.255.252
no sh
!
exit
!
router eigrp 100
no auto
network 10.1.2.0 0.0.0.3
Router 4500_B2_B
conf t
int g0/2
description Blue fibre pointing to Building 1 on 4500B1_B
ip address 10.2.1.2 255.255.255.252
no sh
!
exit
!
router eigrp 100
no auto
network 10.2.1.0 0.0.0.3
!
!
Check again of course but this should be the one you want
Rate if you like this post
Alessio
08-23-2012 03:17 AM
Hi Alessio,
Thanks for the update!
Will test this config and let you know with any output!
Thanks Again.
Jesmond
08-27-2012 02:21 AM
Hi Alessio,
For some reason, I have no option to add an IP address on my tenG interface on my supervisory engine. (WS-X45-SUP7L-E) IP Base Image. Do you know why?
Jesmond
08-27-2012 03:11 AM
Hi Jesmond,
did you issue the
no switchport
command before attempting to install ip? Below there is the guide for your machine...
Alessio
Jokes aside, pls mark this thread as answered
Take Care
Alessio
08-27-2012 03:14 AM
Hi Alesio,
I forgot to issue that command at first, than I rembered and is issued the command and everything is ok.
Thanks!!!
Jesmond
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