Other Network Architecture Subjects

Hello,I was wondering if there is anyway to automatically drop a router interface if another interface fails. I'm trying to tune HSRP, but it will not work properly if I cannot disable my WAN interface if my LAN interface fails. Any ideas?Thanks!!Lee

I have problem with mac address learning on C3750. I need to connect two vlans on the same C3750 by external L2 box (IPS device). This box provides mapping between vlans on trunk ports. Connection is depicted below:int vlan 370 (L3 svi interface)...

Hi Everyone,I just need a clarity on one issue. We have a scenario where we have 2 basestations with Cisco 2950 series switches. There is layer 2 connectivity on bridged mode in between the 2 basestations.a<--->b<---->NOCThe connectivity between b an...

I have 20 3550's in a loop throughout a 50 mile span. They are looped by the GBICs using fiber. Right now there are 4 Vlans all isolated from each other. At this point I need to put cameras in each of these locations which is going to add alot of ...

Hi,I've the config listed below and although when I check the port channel is showing up, the trunk is not. The far end is showing the trunk as being active.If anyone has any ideas why this is not working, please let me know,thanks,Mark interface Por...

I have this error on one of the switches and the port is being disable (GBIC Port) because of that. Nothing but computers and printers are connected to it. I have disable the keepalive on the port so it won't get disable. But still why is getting the...

does anyone know if there is such a cable to connect a pc's USB port to a router/switch console port? I know there are USB to serial adapters but wasn't sure if there was the direct cable to a telco console port

Hello, I ran into a problem last night with one of my C2950T-48-SI's. A minute before 11PM, the switch stopped accepting traffic from all ports between 25 and 31, but was still transmitting to them (unidirectional).Clearing out the configuration of t...

I am trying to setup a network using Cisco 6509's and Marconi ESR5000's. I am running into a problem when I try and run spanning tree. The two different brands of switches are running the same version of STP. What’s happening is the root bridge is no...

I have two cat 2900 16 port switches, for some reason when i read the bandwidth utiliz. values via snmp (PRTG, and MRTG give same results) i only show a steady 1-1.5 kbps up and down flow with occasianal spikes of the upstream to 2 or 3kbps..this is ...

Hello,If I connect switch that runs MST spanning-tree with other Catalyst that runs PVST spanning tree, should I expect problems (they are Catalyst 6500 and 35600 interconnected with trunk)? I heard that maybe some VLANs won't be propagated and that...

http://www.ciscopress.com/articles/article.asp?p=174313&seqNum=4&rl=1"Another special note on Cisco ACLs is that ACLs never apply to traffic generated by the router. So, even if you have an inbound and an outbound ACL on a router denying all traffic,...

During GRE configuration a tunnel source and destination must be configured. Questions…1. Are the tunnel source and destination used in the new IP GRE header?2. If so would the routers require routes for the GRE endpoint destination addresses?3. Can ...

Since a configutation change (routing on a GRE tunnel now) we have the following problem:Some Websites are not accessible.We see that the related IP packets have the 'don't fragment' bit set.A standard ping with big sizes (>1500 bytes) is no problem....

Hi all, If I am using PAT on my router, can I use an access list that permits all ? rather than just a subnet!