Network administrators working on Cisco devices have to search through a lot of detailed information when they run IOS commands. This is when “PIPE” function of Cisco IOS comes as pretty helpful utility.
Let’s see what are the options we get after inputing PIPE “|” function.
R1#sh run | ?
append Append redirected output to URL (URLs supporting append operation only)
begin Begin with the line that matches
exclude Exclude lines that match
include Include lines that match
redirect Redirect output to URL
section Filter a section of output
tee Copy output to URL
We will use above options under PIPE to have more understanding on their usage
In below scenario , the command using PIPE will provide output of interfaces which are down –
Switch#show ip interface brief | include down
GigabitEthernet0/5 unassigned YES unset down down
GigabitEthernet0/6 unassigned YES unset down down
GigabitEthernet0/11 unassigned YES unset down down
GigabitEthernet0/17 unassigned YES unset down down
GigabitEthernet0/19 unassigned YES unset down down
GigabitEthernet0/21 unassigned YES unset down down
Below is output after issuing “show running-config | section bgp” command which displays only BGP section of the running configuration –
Router#show running-config | section bgp
router bgp 65111
bgp router-id 126.96.36.199
neighbor 188.8.131.52 remote-as 65112
Next, with command “show run | begin interface” ,the output starts from the first occurence of the word “interface”.
Router#show run | begin interface
No ip address
No ip address
Further , below are some more examples where PIPE function is used –
show interface status | include Vlan | connected
show ip int brief | exclude ^G
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