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ISIS system ID

‎03-15-2019 01:02 AM

Hi Expert,

Is there a way that I could get IP address from isis system id?

When  show isis hostname it will provide understandable hostname and also system is... its not an iso address right... so anyhow can i get the ip address of the device  from system is? Thanks

8 REPLIES 8
Routing
Solution
Accepted by topic author jar
‎03-21-2019 08:30 PM

Re: ISIS system ID

‎03-15-2019 01:45 AM

By default No. But you can if you configure system ID to represent IP address in Binary Coded Decimal (BCD) format.

 

For example, for ip address 192.168.1.1 the NET address can be configured as  49.0001.1921.6800.1001.00 which consists of the following parts:

  • 49—AFI

  • 0001—Area ID

  • 1921.6800.1001—System identifier 

  • 00—Selector

root@R2# run show isis hostname
IS-IS hostname database:
System ID                   Hostname Type
1921.6800.1001       R1               Dynamic
1921.6800.1002       R2               Static

 

Thanks,
Nellikka
JNCIE x3 (SEC #321; SP #2839; ENT #790)
Please Mark My Solution Accepted if it Helped, Kudos are Appreciated too!!!
Routing

Re: ISIS system ID

‎03-15-2019 01:46 AM

Only if you enceded it first. For example 49.0001.1921.6800.1001.00. You can read it as 192.168.1.1.

 

Regards, Wojtek

Routing

Re: ISIS system ID

‎03-15-2019 02:00 AM

Hi,

Not sure if that's what you are looking for, but in order to find the IP addresses assigned to a system you can use

 

show isis database extensive <SYSID> | grep 'IP prefix:'

 

 

 

Routing

Re: ISIS system ID

‎03-18-2019 03:10 AM

Hi,

Im getting output like below

0102.3325.4010 rtr01.ope1
Routing

Re: ISIS system ID

‎03-18-2019 03:12 AM

Hi,

Noted and thank you. 

got syntax error. Im trying to get all hostname and ip of devices via isis database.

Routing

Re: ISIS system ID

‎03-18-2019 03:45 AM
So the ip address is already encoded in system id and it should be 10.233.254.10

Thanks,
Nellikka
JNCIE x3 (SEC #321; SP #2839; ENT #790)
Please Mark My Solution Accepted if it Helped, Kudos are Appreciated too!!!
Routing

Re: ISIS system ID

‎03-20-2019 12:57 PM

Hi,

as already mentioned, it's sysid is encoded from router-id, you can try either

show isis database 1280.4916.9054 extensive | match "IP router id"
IP router id: 128.49.169.54

 

show isis database R2_re extensive | match "IP router id"
IP router id: 128.49.169.54

 

the second one looks more convinient you just need a hostname, hope that helps

 

 

Routing

Re: ISIS system ID

‎03-21-2019 08:29 PM

Hi Noted and thank you sir.