Switching

I'm supporting a  system administrator  with a Windows server with two 100 Mbps interface connections to a 3750  access switch, IOS is basic 12.55SE1, which is part of a  stack of 3 total switches .  The server's IP is reachable by Layer 3 connection...

Hi, STP question for the experts.  In a large campus Lan with many L2 hops from one end of a vlan to the other, STP diameter could become an issue (Cisco and IEEE both recommend max STP diam=7).  When the network grows, the accepted practice is to se...

Hi AllI’m running into an odd problem with VTP.I have a problem that I cannot figure out…  This problem is occurring in several wiring closets and is easily reproducible. Core switch is a 6509 with Sup2 running hybrid mode.  Core runs in VTPv2 Server...

I am trying to use GLC-GE100FX module in WS-C3750G-24PS who is at version 12.2(55)SE1. I get an error when I insert the module00:11:20: %GBIC_SECURITY_CRYPT-4-ID_MISMATCH: Identification check failed for GBIC in port Gi1/0/2700:11:20: %PM-4-ERR_DISAB...

HI FolksI Already ordered 3750G PoE, my question when it's expected  this powerfull switch to reach the end of life,a.k.a in which yearthanks

Hi all,I am just wondering if it could cause any damage when connecting a PoE enabled ethernet cable to a regular switch.The situation is some of devices are connecting to the regular LAN switch through PoE injector in order to get the PoE for the de...

Hihow to find the reason of the Brodcast  storm ?How to mitigate it, and stop it?thanks

Hello Everybody, I am trying to find if there is any way to completely disable MLD at least on a specific L3 interface, ignoring any incoming MLD traffic. If that isn't possible on an interface level, is there a way to disable MLD globally? I realize...

%SFF8472-5-THRESHOLD_VIOLATION: Te2/6: Rx power high warning; Operating value:  -0.0 dBm, Threshold value:  -1.0 dBm.%SFF8472-5-THRESHOLD_VIOLATION: Te3/1: Rx power high warning; Operating value:  -0.9 dBm, Threshold value:  -1.0 dBm.- Is it possible...

Hi all,I am making a post to get info on a specific issue I have with my 4507 with a sup 7-e installed. I have built a few Sup6 4507 and 4510's without issues like this so when this one came along it left me scratching my head a little.The issue has ...

Hi guys,I have a serious problem (see attached topology)From R1 and R2 i can ping subunterface 10.222.180.1 on R3 but with packet losses ,but i can ping the rest subinterfaces 100%.Also from R3 i receive packet losses when i ping 10.222.180.1( which ...

Hi,I need to make sub-interfaces on a c3750-48TS but not vlan interfaces.I'm currently unable to type any command like that:----------------------------------------------------------------MASTER(config)#int FastEthernet1/0/48MASTER(config-if)#no swit...