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Moving datacenters - transparent bridging programming help needed on Cisco ios

Posted on 2014-11-05
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Last Modified: 2014-12-10
I need to move a datacenter but it will be a slow process.  In the beginning there will be a few systems in the new datacenter and the only traffic needed from DC to DC would be management.  There will be a new internet circuit in the new DC to handle those other items.  So, if the old DC is 192.168.1.x then I'd like to keep the new DC at 192.168.1.x so that I can move equipment and not worry about re-iping things or their dependencies.  the thought by someone is to set up a data T1 between the two sites and do transparent bridging.

Can someone give me the ios configuration for this?  and please don't just send me a link to some Cisco article that I"m not going to understand and is going to be missing half the pieces.   You help is MUCH appreciated
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Question by:atrevido
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by:
aleghart earned 1000 total points
ID: 40426305
A T1 would be incredibly slow to carry internet traffic, much less datacenter traffic.  Get a fiber connection between the two, or a very fat internet connection.

Layer 2 tunnel is what you're looking for.  Using routers, not switches.  It creates a Layer 2 bridge over a Layer 3 connection.  This will let you have the same subnet on both sides of the connection.  L2TP.

Cisco routers might be pricy unless you get them second-hand.  I'm pretty sure Sonicwall TZ series can do it.

Couple those to an 100+Mbps internet connection and you'll be set.

I'd avoid the SOHO IP ranges of 192.168.x.y...to much routing conflict when you're making VPN connections.  Use the other private ranges in 10.x.y.z or 172.[16-31].y.z.
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LVL 32

Expert Comment

by:aleghart
ID: 40426324
...couple those to an _existing_ internet connection...

You shouldn't have to buy a new circuit.  But you can't do it over a cheap asymmetric connection like residential-class DSL, cable, FIOS, or Uverse.  Your weakest link is the slowest speed.

So, 30/5 is really a 5Mbps link or less.  Some carriers will no longer sell symmetric like 35/35 or 50/50 FIOS.  You'll have to get the biggest pipe you can afford to get the best upstream speed.  And, pay for the STATIC IP address.  Should be free or $5/month.

FIOS has a 300Mbps package with 30-50 upstream for around $300/month with static IP.
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LVL 12

Author Closing Comment

by:atrevido
ID: 40490117
The question was really what ios commands on the Cisco router were needed to do tunneling or a bridge.  I didn't really get that, hence the C.  But thanks for the advice
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Expert Comment

by:aleghart
ID: 40490351
What router?
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LVL 32

Expert Comment

by:aleghart
ID: 40490371
Something like this?  Not sure the minimum level of router you'd need.  This sample is from an 2811 only working as the Layer2 bridge.  The LAN/WAN routing is handled by a separate firewall/router.

!
pseudowire-class TEST
 encapsulation l2tpv3
 ip local interface FastEthernet0/1
!
!
interface FastEthernet0/0
 no ip address
 load-interval 30
 duplex auto
 speed auto
 xconnect [their target public IP] 45 pw-class TEST
!
interface FastEthernet0/1
 ip address [my public IP] 255.255.255.x
 load-interval 30
 duplex auto
 speed auto
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 [my public gateway IP]
!
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LVL 12

Author Comment

by:atrevido
ID: 40491706
It's a 3750 Router at both ends.  And thanks!
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