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Switch(config)# monitor session 1 source interface gigabitethernet0/1 both<br />
<br />
is the current conf line 
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Switch(config)# monitor session 1 source interface gigabitethernet0/1 both

is the current conf line

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and it is working if booth ports are same VLAN
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and it is working if booth ports are same VLAN

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It's normal for the line protocol to be down on the destination port when your spanning a port.<br />
<br />
ping is a good way of testing to see if your capturing traffic, although you'll need to ping between two devices - one either side of the port your monitoring and not the device your running wireshark on.
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It's normal for the line protocol to be down on the destination port when your spanning a port.

ping is a good way of testing to see if your capturing traffic, although you'll need to ping between two devices - one either side of the port your monitoring and not the device your running wireshark on.

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i got it done with following:<br />
Switch(config)# monitor session 1 source interface gigabitethernet0/1 both encapsulation replicate
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i got it done with following:
Switch(config)# monitor session 1 source interface gigabitethernet0/1 both encapsulation replicate

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<div class="content wysiwyg-content">
I have cisco catalyst switch and i want to configure port mirroring on that. For that i configured the switch using following :<br />
<br />
Switch(config)# monitor session 1 source interface gigabitethernet0/1<br />
Switch(config)# monitor session 1 destination interface gigabitethernet0/2 <br />
Switch(config)# end<br />
<br />
But after this configuration my switch show line protocol down for monitored interfaces.Please provide your valuable suggestion to get this resolve.<br />
I also want to know how to test whether I'm getting mirrored traffic on monitored port?<br />
I'm trying it with wireshark.<br />
<br />
<br />
Thanks<br />

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</div>


I have cisco catalyst switch and i want to configure port mirroring on that. For that i configured the switch using following :

Switch(config)# monitor session 1 source interface gigabitethernet0/1
Switch(config)# monitor session 1 destination interface gigabitethernet0/2 
Switch(config)# end

But after this configuration my switch show line protocol down for monitored interfaces.Please provide your valuable suggestion to get this resolve.
I also want to know how to test whether I'm getting mirrored traffic on monitored port?
I'm trying it with wireshark.


Thanks


Cisco span problem

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switches / Hubs

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.