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ISIS system ID

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  • 1.  ISIS system ID

    Posted 03-15-2019 01:02

    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



  • 2.  RE: ISIS system ID

     
    Posted 03-15-2019 01:46

    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



  • 3.  RE: ISIS system ID

    Posted 03-18-2019 03:11

    Hi,

    Im getting output like below

    0102.3325.4010 rtr01.ope1


  • 4.  RE: ISIS system ID
    Best Answer

    Posted 03-15-2019 01:46

    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

     



  • 5.  RE: ISIS system ID

    Posted 03-15-2019 02:01

    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:'

     

     

     



  • 6.  RE: ISIS system ID

    Posted 03-18-2019 03:13

    Hi,

    Noted and thank you. 

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



  • 7.  RE: ISIS system ID

    Posted 03-18-2019 03:46
    So the ip address is already encoded in system id and it should be 10.233.254.10



  • 8.  RE: ISIS system ID

    Posted 03-20-2019 12:58

    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

     

     



  • 9.  RE: ISIS system ID

    Posted 03-21-2019 20:29

    Hi Noted and thank you sir.