Other Network Architecture Subjects

Hi We have a Cisco 3750 catalyst switch acting as L3 core with GLC-T= 1000BASE-T SFP modules.We have 3560 access switches with GLC-T= 1000BASE-T SFP modules.What kind of Cat 5(or 6)cables we need to use to connect the access switch to the core using ...

Hi All,I have a pair of 3750 switches here. I tried to gigastack them.I increased the priority on switch 1 to make it the master.I then wrote the configs to memory and shut both switches down while i installed the cables on the back.When the switche...

I have been testing QoS on the various Catalyst platforms recently (2950, 3550, 3560/3750) and am a bit disappointed with the statistics that are available from the CLI. The 3550 seems to offer the best with the 'mls qos monitor' interface command.O...

http://www.sprint.net/multicast/faq.htmlQ: What is IGMP?A: The Internet Group Management Protocol (IGMP) is a protocol that controls group membership individual hosts. This protocol only operates in a LAN setting,-----etc. Does IGMP operate in LAN en...

hi all Plz let me know the concept of untagged vlans/native vlans and where should we use them . i cant find a situation where we can use them . also let me know how to configure extreme network switches ( alpine 3804 , 48si ) . any link for its docu...

HI,I hv cisco 2621 router frm its etthernet it's converted into E-1 (T-1 in USA ) then fiber optics again after almost 1200 km it is converted into ethernet frm E-1. but while i m putting real traffic in this link i m getting intermediant drops at th...

HelloI have a dual 2851 HSRP configuration, with hosts being statically natted by the routers. I'm using ARP alias to ensure that the IP addresses have the virtual HSRP MAC address, and no the router's own MAC addresses.This config works fine, but ea...

I am looking at a 2801 router and i have the choice of picking an IOS. what is the IOS SP services software? what does SP mean? also is there a way for me to find the differences between say IP base and enterprise versions of software? thanks

I had a problem with a switch on my network..the problem that is boot normally when i start it, but no switching function, and no ping between client unless the ports work well!!

when disabling cdp on a interface, it still sends out updates during bootup.but if we disable cdp on the whole switch, it does not send out any updates during bootup. Is this correct or is it a bug? I haven't found anything documented on this.

((Dynamic Trunking Protocol (DTP), as the name implies, is the protocol used to automatically negotiate a trunk link. DTP supports the auto negotiation of both ISL and 802.1q. By default all ports on the Catalyst 3550 are dynamic desirable ports whic...

I have 5 2950G-48 switches and 2 3550 switches, and 1 3508 router. The 7 switches connected to 3508 switch thru 1000base-sx sc-sc fiber. the ethernet0/0 of router 3640 connected to one of the 2950 switch and configure as trunk. Now I create 5 vlan. t...

himy site has two supervisor engine of the C6509state of first superviosr is active and state of second supervisor is stanbyAm i verify stanby supervisor dram size on this condition ?what command is verify stanby supervisor dram size?

Anyone know off-Hand how to remove Telnet and Finger services from a 1700 series router running IOS 12.1 or 12.2? I figured it'd be as simple as 'no telnet service' or 'no telnet server' just like the 'no http server' command, but no such luck. Also,...

I have a temporary requirement to add a second server to our network. Both servers have to be accessible from outside, using the same ports (80, 443, 22 and 12001). Unfortunately we only have one IP fixed address at this location but we do have a cou...