Ok, I'm stumpped. I'm trying to get RSPAN going between my 4500s. I used to have it working, replaced my 4500 cores with Nexus 5500, which don't support RSPAN.
I have a "Backup" type of a network to a secondary server room in my building, the core of that is a 4507R. So basicaly, I have 5 floors, each connected to my two Nexus cores via a L2 trunk. Also, each of the 5 floors is connecting to a 4507 via L2 links as well.
I've created RSPAN vlan 900 on the 4507R, which it propogated via VTP to my floor switches as well as my nexus switches. I have blocked vlan 900 on the uplinks to my Nexus switches, and made the 4507R the Spanning-tree root for vlan 900. I also verified that VTP Pruning is disabled, Nexus 5500 dont support it and 4500s show it as disabled. So really, RSPAN should only work across the backup links.
On my RSPAN destination port, I am only seeing broadcast and multicast traffic that would be on the remote port. My PC is connected to port gi6/46 on 4th floor switch. It's really strange. I don't see any unicast traffic. I've tried this from both 2nd and 3rd floor switches and i'm seeing traffic from the respective VLANs. Same results. I'm wondering if the Nexus switches, not supporting RSPAN, could be causing this behaviour? Here's some outputs that would hopefully shed some light on my setup.
My floor switches are 4506 (Sup-II+), IP Base.
(cat4500-IPBASEK9-M), Version 12.2(53)SG1
4507R (Sup-IV) switch IOS:
I've configured an RSPAN session from 3rd floor to 4th floor:
So I put my my switches into Vito transparent mode, except for the two nexus cores. Those are really the only two devices on my environment that need the same vlan info.
Anyway, put then all into transparent. I blew away the vlan on all the switches and recreated as rspan on the impacted switches. Still no go. I thought maybe port-security on my destination port was causing something, I defaulted the port but still no go. Here's a thought. I do some L2 filtering at the access layer. Could there be an ether type I would need to permit? I don't have anything applied to vlan 900 though.
[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...