Switching

"When a frame comes into a switch port, the frame is tagged internally within the switch with the VLAN number of the port. When it reachesthe outgoing port, the internal tag is removed. If the exit port is a trunk port, then its VLAN is identified in...

hi, I tried to find in all Cisco Press this but it is not mentioned (using safari online books). so in this example, interface gig 1 ip nat inside interface gig 2 ip nat outside ip nat pool XYZ 1.1.1.1 1.1.1.254 prefix-length 24 ip access-list sta...

I have connected one D-link & 3Com switches to cisco Switch WS-3650-48PS having IOS version 03.07.02E. But link is not coming up. Error:  %PM-4-ERR_DISABLE: psecure-violation error detected on Gi1/0/32, putting Gi1/0/32 in err-disable state%PORT_SE...

I just built a network in the new office. It is based on Cisco 6880 in VSS and few (6) stacks of 6800ia. we moved our three offices to this new network. They used  Cisco IP Phones in the old offices and they brought theirs phones to the new office.  ...

Hi guys,I'm testing multicast deployment on the lab shown below. The sender and the receiver are connected to the 6500 in two different vlans. The sender is in vlan 23 and the reciever in vlan 500. They are connected to the 6500 with a trunk link. Th...

Hi,I have a hierachical network design using VSS as core switch/router, redundant distribution switches and access switches with multiple VLANs.Details:     - EIGRP (EIGRP stub on distribution switches)     - Routed-Etherchannels (/31) between core a...

Hi, I use Sophos AV feature that needs to send a broadcast on a specific port to communicate with a server."When a laptop icts rental exchange, the Sophos AutoUpdate component of Endpoint Security and Control installed on the laptop determined que la...

Hello, Is there a way to assign DHCP address for L3 routed ports on 6500. I can do it on 4500 using IP address DHCP command, but for some reason the command is not supported on the 6500. If the command is not supported, any idea how to go about it....

I am having an issue where a switch I have won't give up root. The switch I want to be root I set at a priority of 4096, and set the priority of the switch that I don't want to be root at 20480. However the switch at 20480 still thinks that it is roo...

hi, I did not find my answers in the document, as I understnad that IRDP: Specified in RFC 1256, this is a legacy FHRP solution. IRDP allows IPv4 hosts to locate routers that provide IPv4 connectivity to other (nonlocal) IP networks we use to do th...

I have a problem with IP Multicast Setup The Setup: Because the layer2 segment between the both routers doesn't support PIM-snooping, I have to build a GRE tunnel between the both routers. C3650 is the rendezvous point (autorp). Over the GRE Tunnel i...

On one of our 2960s we see rps allarm: DCOut  State   Connected  Priority  BackingUp  WillBackup  Portname        SW#-----  ------- ---------  --------  ---------  ----------  --------------- ---    1  Active  No                6  No         No      ...