Switching

IP Phones

Hi guys i am so glad my question on my previous discussion was answered spot on. Now i have another problem - ip phones.I know how to configure IP phones and im able to call another phone using dial-peer.My problem is I cant call another ip phone far...

Switch flapping

I am facing a severe issue of mac address flapping.Mainly it is due to the bridging on the workstation side I suspect.2 NIC on workstation are bridged .LAN from one NIC is going to SW1 and LAN from SW2 is going to SW2 .This has been done for LAN redu...

Migrate 6500 to ASR 1000

Hi all, I have to migrate 6500 to ASR 1000, is there any procedure to do this? thanks.

Resolved! VTP pruning , A question

hiThere is a switch with vtp pruning enabled,and this switch does not have any access port on vlan 4,except an ip address and mask that is assigned to vlan 4 interface.My question is:does vtp pruning can cause this switch not accesible through an ip ...

MAC flapping

First post requesting help, so be gentle. I'm getting MAC flapping errors at one of my remote sites. I've traced the MAC using the "sh mac address-table address [mac]" command, but it keeps leading me to trunk ports going to other switches - never...

Unable to SSH switch due to no exec timeout set

Hi, it looks as though someone as set no exec timeout on the VTY lines of a remote switch. We are unable to connect to this now via SSH even though it is up and running. Looking at the configuration backups I can see that the no exec timeout comman...

DHCP server assigns same ip address to multiple clients

we have a trouble with dhcp server in our network. we have cisco c3850 L3 switch as a dhcp server and the problem is that, sometimes clients can not receive lease.when I type #show ip dhcp binding, 192.168.137.16 0100.21b7.5e81.64 Sep 21 2015...

System not accessible with Sub Interface configured on router

We had configured sub interfaces on our router to connect our local lan, fa 0/1.7, fa 0/1.8, After that we had configured vlans like vlan 7 & 8 on L2 switch. Network is working properly, when I am trying to ping from vlan 7 to vlan 8, then I am getti...

MAC flapping on STP blocked port

The port g1/1/3 is getting blocked by STP on VLAN75.After there are MAC flapping messages for multiple MACs in VLAN75 in that port. Hence the switch is building the MAC table for packets received on g1/1/3.My understanding was that a port in blocked ...

Strange packet losses when traffic is routed via gateway

Setup is Catalyst C4500X x.x.20.1 (IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.07.00.E), as default gateway for subnet x.x.20.0/24, with static routing to several other gateways.Testing from host x.x.20.200...

Routing issue And Vlan isue

We have an new network setup of 4500 Core and 2960 at access level with 15 vlans up with intervlan communication and running excelentwithout any issues. Cisco Core switch Wan Vlan IP is 10.6.100.1 255.255.255.252Route 0.0.0.0 0.0.0.0 10.6.100.2 Forti...

Open Bug - CSCty98415 - Sev3 - Need additional details

Does anyone have any additional information on open bug CSCty98415? The bug details state to contact TAC. Trying to get more information before opening a case. Thanks in advance,

Resolved! EIGRP Routing between Routers and Switches

HiI have a network setup as follows: Router | |Core Switch 1----------Core Switch 2 The switches are running HSRP for all the access layer switches. Now I understand this is not the best setup but its all we have. The router has no spare...

Backplane, forwarding bandwidth, throughput calculation

Dear All,Thank you very much for your kind cooperation.I need a help about how to calculate Backplane, forwarding bandwidth, throughput of a switch and router. Please help me as soon as possible. With regardsMehedi Hasan