https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_52_se/configuration/guide/3750scg/swspan.html
Switch(config)#monitor session 1 source int
Switch(config)#monitor session 1 source interface f
Switch(config)#monitor session 1 source interface fastEthernet 1/0/1
Switch(config)#mo
Switch(config)#monitor es
Switch(config)#monitor se
Switch(config)#monitor session 1 de
Switch(config)#monitor session 1 destination in
Switch(config)#monitor session 1 destination interface fa
Switch(config)#monitor session 1 destination interface fastEthernet 1/0/2 en
Switch(config)#$tination interface fastEthernet 1/0/2 encapsulation re
Switch(config)#$nterface fastEthernet 1/0/2 encapsulation replicate
Switch(config)#
Switch(config)#mon
Switch(config)#monitor se
Switch(config)#monitor session 2 sou
Switch(config)#monitor session 2 source in
Switch(config)#monitor session 2 source interface fa
Switch(config)#monitor session 2 source interface fastEthernet 1/0/3
Switch(config)#mo
Switch(config)#monitor se
Switch(config)#monitor session 2 de
Switch(config)#monitor session 2 destination int
Switch(config)#monitor session 2 destination interface fa
Switch(config)#monitor session 2 destination interface fastEthernet 1/0/4 e
Switch(config)#$tination interface fastEthernet 1/0/4 encapsulation re
Switch(config)#$nterface fastEthernet 1/0/4 encapsulation replicate
Switch(config)#exit
Switch#
00:48:50: %SYS-5-CONFIG_I: Configured from console by console
00:51:40: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet1/0/1, changed state to down
00:51:41: %LINK-3-UPDOWN: Interface FastEthernet1/0/1, changed state to down
00:51:48: %LINK-3-UPDOWN: Interface FastEthernet1/0/1, changed state to up
00:51:49: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet1/0/1, changed state to up
00:52:25: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet1/0/1, changed state to down
00:52:26: %LINK-3-UPDOWN: Interface FastEthernet1/0/1, changed state to down
00:52:32: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet1/0/3, changed state to down
00:52:32: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan191, changed state to down
00:52:33: %LINK-3-UPDOWN: Interface FastEthernet1/0/3, changed state to down
Switch#
Switch#
Switch#no
Switch#no
% Incomplete command.
Switch#
Switch#no mo
Switch#sh mo
Switch#sh monitor se
Switch#sh monitor session 1
Session 1
---------
Type : Local Session
Source Ports :
Both : Fa1/0/1
Destination Ports : Fa1/0/2
Encapsulation : Replicate
Ingress : Disabled
Switch#sh monitor session 2
Session 2
---------
Type : Local Session
Source Ports :
Both : Fa1/0/3
Destination Ports : Fa1/0/4
Encapsulation : Replicate
Ingress : Disabled
Switch#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#not
Switch(config)#no mo
Switch(config)#no monitor se
Switch(config)#no monitor session 1
Switch(config)#no monitor session 2
Switch(config)#exit
Switch#