08-22-2007 06:13 AM - edited 03-03-2019 06:25 PM
Basically, I have two sites connected by a 100Mb Colt line with a Cisco 2600 at each end and then at each site I have a 3750 cluster providing LAN switching, routing etc.
I have set up each site to have the same VLAN numbers; VLAN10 - Servers, VLAN20 - Workstations etc and have applied a different subnet to each of these at each site; 10.1.10.0/23 for VLAN10 at site 1 and 10.2.10.0/23 for VLAN10 at site 2. Sounds simple so far....
I want to set up a vlan which spans the two sites for an Exchange 2007 cluster heartbeat, but aren't too sure how I would go about it. I can set up the same vlan (vlan50) at each site, but don't know how I would get them talking...
I know, I'm being thick...
Thanks in advance for any help...
08-22-2007 08:12 AM
dear,
you have to know that VLAN is a layer 2 not 3
then you can using any routing protocol or static to to get the diff. networks talking with each other.
08-23-2007 01:42 AM
I'm not sure that I understand. Can you give a bit more detail?
Thanks in advance...
Campbell
08-23-2007 06:18 AM
You can do Bridging to extend the LAN from the other location to this.
you have to create BVI interfaces on both sides search on cisco site for more details
08-28-2007 11:37 PM
hiii, i dont think u can extend VLAN over the different sites
U can use router on stick feature to communicate between diffrent vlans, but can be on layer 2, not on layer 3
08-28-2007 11:48 PM
Here we go. VLANs are not scalable us we need for today's technology. The best way to get thinks work for you for this requirement would be start running MPLS on you LAN and get extended to other site LAN as well but your 3750 will not support
08-28-2007 11:55 PM
hey, how can we do this, can u plz brief me
thx
08-28-2007 11:55 PM
hey, how can we do this, can u plz brief me
thx
08-29-2007 01:52 AM
Transporting Labeled Packets over LAN Media
Exactly one labeled packet is carried in each frame.
The label stack entries immediately precede the network layer header,
and follow any data link layer headers, including, e.g., any 802.1Q
headers that may exist.
The ethertype value 8847 hex is used to indicate that a frame is
carrying an MPLS unicast packet.
The ethertype value 8848 hex is used to indicate that a frame is
carrying an MPLS multicast packet.
These ethertype values can be used with either the ethernet
encapsulation or the 802.3 LLC/SNAP encapsulation to carry labeled
packets. The procedure for choosing which of these two
encapsulations to use is beyond the scope of this document.
chk this RFC - http://rfc.net/rfc3032.html#p18
Chk this as well - http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121limit/121ex/121ex8a/eompls9.htm
08-29-2007 12:39 AM
Hi Campbell,
Besides bridging - as mentioned in another post - you could also go with L2TPv3 to "stretch your VLAN" between the two sites.
The config is fairly simple and straight forward, if you follow the guidelines in "L2TPv3: Layer 2 Tunneling Protocol Version 3"
http://www.cisco.com/en/US/products/ps6350/products_configuration_guide_chapter09186a00804420e7.html
One more note though: in any case bridging or L2TPv3 is fairly CPU intense, if large amounts of data are to be transported. You might want to do some performance tests with your 2600 running 12.3(2)T or newer before implementing it. You were only talking about heartbeat but there might be more traffic between the Exchange servers.
Hope this helps! Please rate all posts.
Regards, Martin
08-29-2007 02:22 AM
If sites are connected using Ethernet interface, then you can setup subinterfaces. If VLAN would be for example 555, than it would be:
Switch1:
switch mode trunk
switch trunk allowed vlan 555
Router1 (on both interfaces - to switch and to the other site)
interface fast 0/0.555
encapsulation dot1Q 555
Router2
interface fast 0/0.555
encapsulation dot1Q 555
Switch2
switch mode trunk
switch trunk allowed vlan 555
08-29-2007 02:29 AM
I think that is exactly what I'm after. I need to be selective with the VLAN's that I'm pushing across; I don't want all traffic to go across the WAN, just those required.
I'm going to give this a go and see what happens.
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: