Hi, On Fri, Mar 12, 2010 at 03:18:37PM -0800, Leah Lynch (Contractor) wrote: > I am working on a project to connect a Cisco 6500 switch between > switches of two other manufacturers - Ciena 5300 and Ceterus 8212 > devices. Has anyone out there run into any issues connecting to these > devices using 802.1q? The Cisco switches will just be bridging tagged > traffic from one device to the other. The only issue I can think of is > Cisco's use of the native VLAN. However, I have seen Cisco switches > connect to other switches that do not have the concept of a native VLAN, > and there were no issues in those cases.
Gotchas you could run into:
- native VLAN - how do the other two switches handle untagged packets
on a 802.1q link? -> I'd go for "all tagged", that is, make the
"native" VLAN on the Cisco something that is not on the link at all.
- VLAN 1 - this is "special" on smaller Cisco switches, so we tend to
completely avoid usage of VLAN 1.
- per-vlan spanning tree (if you have redundant links) - many vendors
don't seem to understand that "single-STP plus VLANs" = "deseaster",
so you might be forced to use MST.
(Forget that if you have no redundant links)
gert
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Gert Doering - Munich, Germany [email protected]
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