Other Network Architecture Subjects

We have muitiple 4006 deployed at various building aggregation locations inside our office campus. But for new buildings we would like to consider 3550 12G switch since we use only gig ports of 4006 as uplinks to various stack of 3524/3548 whithin th...

I have cat 5509 with dual power supplies .I am getting blinking system and fan LED green and red.On console I am getting %SYS-2-FAN-Failand Show system command is showing System and fan status failbut all fan and power supplies are working and system...

Does anyone have a good explanation of what causes a symbol error on an interface? I have a few switches that are getting these errors and can't find a good resource on what could be causing this issue.Port CrcAlign-Err Dropped-Bad-Pkts Coll...

We are an ISP - one of our products include the setup of "One dial-up account for multiple users". This is to cater for large groups looking for a cheaper rate.With the analogue dial-up we do not have a problem at all, but with the ISDN connections ...

Greetings - I have 2 T1 Point-to-Point connections running from HQ to a Branch office. We just implemented a T1 Frame Relay backup for the Point-to-Point lines. Here is the problem:EIGRP causes the Frame Relay line to have the same metric as the po...

I am getting a high number of errors on a point to point t1. The t1 provider has told me that the circuit is fine and it appears to be a clocking issue on my end since they do not provide any clocking on a point to point. One end is a 3640 router w...

I have Catalyst 2950 with IOS version 12.1.12c. When some ports are in blocked state, on my show spanning tree command i get , instead of blk, bkn*.Does anyone knows what is it?

Hi,My 3524 switch has just recently went dead butI am not sure exactly what the issue is. The power cable is plugged in but however,I am not getting any LED lights. It was justa few weeks ago.Not sure what the deal is. I opened the chassisto see b...

How do I get the ip protocol up on a vlan that has no devices plugged into a switchport associated with that vlan? Is it not possible?

I want to do L3 etherchannel between 3550-12g and 6509 for redundancy.Can I do this?thanks! any comment is apprecatied.3550-12g-(g0/1,g0/2)----------(4/1,4/2)--65096509:set port channel 4/1-2 10set port channel 4/1-2 mode onset vlan 10 4/1-26509 msfc...

I was working in my server room over the weekend doing some cable management and cleanup and we decided to reboot the switch. I saved off the configuration and proceeded to power it down and then back up again. Low and behold, the configuration for e...

I'm trying to secure a VLAN using VACL on a 6509 CatOS 5.4(1) and it doesn't work. I have created a MAC ACL, based on the source host mac and ANY as the destination, example:set security acl mac test permit host 00-01-02-03-04-05 anyThere are 16 ACE'...

HI all,In a simple "WAN + LAN port" router, if I am to reserve a certain amount of BW(say 300K out of 512K) for a specific device(say with IP 10.1.1.1), i.e. in other words to set a max. BW limit(i.e. 200K) to all other traffic(except that IP). Can y...

I have a 2meg internet connection presented as x21 on a 3600 router my provider is going to increase this by another 2 Meg. To do this they are going to present another 2 meg on an additional x21 cable. My problem is i use IP unnumbered for the ip ad...