Does anyone know any free software that can simulate cisco switches commands? I would like to know the outcome if I run certain command lines on a cisco switches. I do not have apre switches to test or see what it does. Basically I just want to see what happen if I run a command line that has an existing command like
switchport trunk allowed vlan 8,9,10
After - Need to add vlan 80
What would happen if I ran the command line?
switchport trunk allowed vlan 80
I found out that it will remove all the vlan on port-channel11 except 80 and that cause major problems. I had a space between comma each number and I did not know that.
So my thing is I would like to simulate something like this and show me the outcome if I ran that command.
The vlan-list format is all | none | add | remove | exceptvlan-list[,vlan-list...] where:
•all—Specifies all VLANs from 1 to 1005. Beginning with Cisco IOS Release 12.4(15)T, the valid VLAN ID range is from 1 to 4094.
•none—Indicates an empty list. This keyword is not supported in the switchport trunk allowed vlan form of the command.
•add—Adds the defined list of VLANs to those currently set instead of replacing the list.
•remove—Removes the defined list of VLANs from those currently set instead of replacing the list.
•except—Lists the VLANs that should be calculated by inverting the defined list of VLANs.
•vlan-list—Is either a single VLAN number from 1 to 1005 or a continuous range of VLANs described by two VLAN numbers, the lesser one first, separated by a hyphen that represents the VLAN IDs of the allowed VLANs when this port is in trunking mode. Beginning with Cisco IOS Release 12.4(15)T, the valid VLAN ID range is from 1 to 4094.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...