We have a proposed design as you see it in the attached diagram. We want to use GLBP between the two 6500's and each of them are in a separate physical site that is connected via single mode fiber. As you can see we have connected the 4948's, which are acting as Layer 2 distribution switches, using the fiber. The 6500's are each part of the GLBP setup.
Is this a bad way to set this up? What I am looking for is drawbacks or alternative setups using the same equipment.
No reason it shouldn't work... that said, I wouldn't want to install it this way either.
I'd like to see the two core switches joined together so that they aren't using the distribution switches as trasit devices.
I would also look to dual home the distribution switches to the cores. I've attached a dodgy drawing of what I would do.
Spanning tree is bit of a issue in my network where in yours it's not so much rapid spanning tree will sort that out easily. I guess it's dependent on what your building the network for. Are the core switches where the servers are? That would be an issue in your network as the Core switches will get isolated should you lose one of your distribution switches. where it's not a problem in mine.
any way have a look and shoot holes in it if needed. every design has flaws. I might just need to understand your requirements a bit better...
This configuration was chosen because the connection between the two sites is via fiber. I had to use the 4948's as the connection between the two sites because on the 6500's I don't have a fiber card, Only the two ports on the sup 720's. (So no place to terminate)
Is it bad that I have connected things via the 4948's? I thought it would minimize the chances of failure by adding more connections between the sites. I plan to add two more 4948's to the site "a" which would make 4 fiber connections between the sites. On one side there would be 4 fiber cables, one on each 4948, going directly into the two 4948's in site "b" (As you know there are 4 sfp ports on a 4948).
Is there a better way to do it given my apparent limitation?
I really appreciate the insight of whomever answers!
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...