Buy or Renew
Buy or Renew

Switching

Discuss Catalyst brand switches with peers and experts.
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
cancel
Start a conversation

Get 20% off switches when you combine Cisco solutions

 
Labels

Forum Posts

Start a conversation

Resolved! Virtual router redudancy protocol questions

HI every body!I have few questions:1)In HSRP, one router is chosen as active while the other is chosen as standby, all the rest would be in listening state. What about VRRP?In vrrp, one router is chosen as master,are all the rest chosen as back up r...

sarahr202 by • Level 5
  • 2118 Views
  • 23 replies
  • 0 Helpful votes

Resolved! dhcp snooping and option 82

Hi every body!Here is what my book says:" you can also configure the switch to use dhcp option 82, the dhcp relay agent information option,which is described in rfc 3046. when a dhcp request in intercepted on an untrusted port,the switch adds its own...

sarahr202 by • Level 5
  • 921 Views
  • 4 replies
  • 0 Helpful votes

Resolved! dhcp lease

Hi every body! Let say host gets an ip address from dhcp server with lease=20 days.Let say the host is unplugged , will dhcp server reserve the ip address for 20 days?thanks a lot!

sarahr202 by • Level 5
  • 898 Views
  • 3 replies
  • 0 Helpful votes

Resolved! UUFB and/or UUMB

Looking for real world use of these features.UUFB -unknown unicast flood blockingUUMB -unknown multicast flood blockingWhen a new device initially connects to a switch port, the devices MAC address is unknown so by default the switch MUST add this ne...

fsebera by • Level 4
  • 1839 Views
  • 1 replies
  • 0 Helpful votes

Possible EtherChannel + Failover

Hi,Please advice and suggest ....I have 4-sites all connected with each other.** Site A is connected with Site B withTwo physical links 10MB and 15MB** Site A is connected with Site C withTwo physical links 8MB and 10MB** Site A is connected with Sit...

Storm control direction

HiI'm having a senior moment. Which way does storm control work on an interface ? Does it monitor incoming broadcasts and not pass them to the bus or outgoing broadcasts and not send them on the wire ?The issue is if you want to protect a server do y...

VLAN topology for VM environment

We're about to plan the deployment of some new virtual machines, based on vmware.Switching is based on cat6500/sup72 running native IOS.Virtual machines should be deployed on several VLANs.just thinking of putting 4 netcards on server:- 1 for managem...

ibrunello by • Level 1
  • 369 Views
  • 1 replies
  • 0 Helpful votes

CatOS to IOS conversion failure

During a CatOS to IOS conversion we experienced a power failure - :(After we recovered from the power failure, the switch boots into the SP rommon mode.Issuing the "boot" command (rommon> boot) the switch boots to the RP mode, reads the new IOS image...

fsebera by • Level 4
  • 2876 Views
  • 9 replies
  • 0 Helpful votes

C6509 HSRP Problem

Hello, We have C6513 with Dual Sup 720 + MSFC3. There is one HSRP group configured on about 30 VLANs. On all the VLANs the HSRP shows that primary MSFC is the active and the second MSFC is standby except one group which shows active on both.Any ide...

m-haddad by • Level 5
  • 598 Views
  • 3 replies
  • 0 Helpful votes

3750 upgrade code

I have a 3750, with 12.2(40)se on it. When I try and upgrade I get an out of space message. I'm unable to delete the bin file that is on the switch.

6tgreene by • Level 1
  • 844 Views
  • 5 replies
  • 0 Helpful votes

Resolved! dhcp snooping

HI every body!I was reading about DHCP snooping. That is what my cisco book says:" When dhcp snooping is enabled, switch ports are categorised as trusted or untrusted. Legitimate dhcp servers can be found on trusted ports,whereas all other hosts sit ...

sarahr202 by • Level 5
  • 739 Views
  • 3 replies
  • 0 Helpful votes

Catalyst 2948 SNMP

Dear all, I spent almost a day in searching for the correct way to set up SNMP in cisco, but all I can find is setting the community for a traps receiver, which results that I can not send requests.May I ask if any one can help me, so I can snmpwalk ...

MrCheHMqm by • Level 1
  • 1093 Views
  • 6 replies
  • 0 Helpful votes

Trouble forwarding between 7600 and 6500

Hi!I have 7600 config:gw#sh run int gi1/31Building configuration...Current configuration : 175 bytes!interface GigabitEthernet1/31 switchport switchport trunk encapsulation dot1q switchport trunk native vlan 6 switchport trunk allowed vlan 6 switchpo...

mkachalin by • Level 1
  • 604 Views
  • 5 replies
  • 0 Helpful votes

Cisco 1721

I need to be able to do the following two things: - reset device to factory, I tried to reset it and know I get a "permission denied" error when I try to "copy tftp running-config" - how to fix the Permission denied error ......Please help

dukeminus by • Level 1
  • 754 Views
  • 4 replies
  • 0 Helpful votes
View All
Review Cisco Networking for a $25 gift card