Cisco Router IOS XR Manuale Utente Scaricare il pdf (Pagina 35)

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Now, let’s see what happens when we do a show int for that alias

RP/0/7/CPU0:R1#sh int r2connection

RP/0/7/CPU0:R1#sh int gig0/3/0/2

Mon Apr 16 15:24:00.745 UTC

GigabitEthernet0/3/0/2 is up, line protocol is up

<--- SNIP -

0 output buffer failures, 0 output buffers swapped out

5 carrier transitions

Pretty neat, but it gets better – we can actually configure that alias as

well!

RP/0/7/CPU0:R1#conf t

Mon Apr 16 15:24:06.626 UTC

RP/0/7/CPU0:R1(config)#int r2connection

RP/0/7/CPU0:R1(config)#int gig0/3/0/2

RP/0/7/CPU0:R1(config-if)#exit

RP/0/7/CPU0:R1(config)#exit

RP/0/7/CPU0:R1#

Now, there is another trick with IOS XR, and that is variables!

So, what can we do with Variables and Aliases? Well, if there is a command

that you use quite often – say show interface, why not change it to an alias

with a variable.

For this example, we will create sint (show interface) and use variable

(var1).

But first, let us look at what happens when you add a question mark (?) to

the end of the command in configuration mode:

RP/0/RSP0/CPU0:c21.lab(config)#alias sint ?

LINE Alias body with optional parameters e.g,(name) show $name

As you can see, it even tells you that you can use variables, might not be

obvious, that that is what (name) is.

So, let us create our alias:

RP/0/RSP0/CPU0:c21.lab(config)#alias sint (var1) show interface $var1

RP/0/RSP0/CPU0:c21.lab(config)#commit

RP/0/RSP0/CPU0:c21.lab(config)#

Now we can test it on Interface Bundle-Eth 100:

RP/0/RSP0/CPU0:c21.lab#sint(Bundle-Eth100)

RP/0/RSP0/CPU0:c21.lab#show interface Bundle-Eth100

Bundle-Ether100 is up, line protocol is up

Interface state transitions: 3

Hardware is Aggregated Ethernet interface(s), address is 6c9c.ed2d.0bab

Internet address is 157.238.206.3/31

MTU 1514 bytes, BW 20000000 Kbit (Max: 20000000 Kbit)

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Cisco Router IOS XR Manuale Utente Pagina 35