[j-nsp] M7i Compact Flash

angel angel.bardarov at btc-net.bg
Mon Apr 7 07:26:03 EDT 2008


Yes- it appears to be possible to install and run Junos 9.0 with 256MB 
CF in LAB environment (system is M320 w/ RE-4.0):

*********************************************************
--- JUNOS 9.0R2.10 built 2008-03-06 10:55:35 UTC

lab at edge-b1>

lab at edge-b1> show version
Hostname: edge-b1
Model: m320
JUNOS Base OS boot [9.0R2.10]
JUNOS Base OS Software Suite [9.0R2.10]
JUNOS Kernel Software Suite [9.0R2.10]
JUNOS Crypto Software Suite [9.0R2.10]
JUNOS Packet Forwarding Engine Support (M/T Common) [9.0R2.10]
JUNOS Packet Forwarding Engine Support (M320) [9.0R2.10]
JUNOS Online Documentation [9.0R2.10]
JUNOS Routing Software Suite [9.0R2.10]

lab at edge-b1> show system storage
Filesystem              Size       Used      Avail  Capacity   Mounted on
/dev/ad0s1a             217M       112M        88M       56%  /
devfs                   1.0K       1.0K         0B      100%  /dev
devfs                   1.0K       1.0K         0B      100%  /dev/
/dev/md0                 26M        26M         0B      100%  
/packages/mnt/jbase
/dev/md1                110M       110M         0B      100%  
/packages/mnt/jkernel-9.0R2.10
/dev/md2                 43M        43M         0B      100%  
/packages/mnt/jpfe-M320-9.0R2.10
/dev/md3                3.7M       3.7M         0B      100%  
/packages/mnt/jdocs-9.0R2.10
/dev/md4                 35M        35M         0B      100%  
/packages/mnt/jroute-9.0R2.10
/dev/md5                 10M        10M         0B      100%  
/packages/mnt/jcrypto-9.0R2.10
/dev/md6                 22M        22M         0B      100%  
/packages/mnt/jpfe-common-9.0R2.10
/dev/md7                2.0G      10.0K       1.8G        0%  /tmp
/dev/md8                2.0G       748K       1.8G        0%  /mfs
/dev/ad0s1e              24M       926K        21M        4%  /config
procfs                  4.0K       4.0K         0B      100%  /proc
/dev/ad1s1f              25G       7.5G        16G       32%  /var

lab at edge-b1> show chassis routing-engine   
Routing Engine status:
  Slot 0:
    Current state                  Master
    Election priority              Master (default)
    Temperature                 30 degrees C / 86 degrees F
    CPU temperature             31 degrees C / 87 degrees F
    DRAM                      2048 MB
    Memory utilization          16 percent
    CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     2 percent
      Interrupt                  0 percent
      Idle                      97 percent
    Model                          RE-4.0

    Start time                     2008-03-18 15:16:01 EET
    Uptime                         19 days, 21 hours, 59 minutes, 37 seconds
    Load averages:                 1 minute   5 minute  15 minute
                                       0.33       0.24       0.09

I also upgraded M7i machine which has less DRAM installed into RE. 
Unfortunately this one doesn't have CF at all ... ;)

lab at edge-c4> show version   
Hostname: edge-c4
Model: m7i
JUNOS Base OS boot [9.0R2.10]
JUNOS Base OS Software Suite [9.0R2.10]
JUNOS Kernel Software Suite [9.0R2.10]
JUNOS Crypto Software Suite [9.0R2.10]
JUNOS Packet Forwarding Engine Support (M/T Common) [9.0R2.10]
JUNOS Packet Forwarding Engine Support (M7i/M10i) [9.0R2.10]
JUNOS Online Documentation [9.0R2.10]
JUNOS Routing Software Suite [9.0R2.10]

lab at edge-c4> show system storage
Filesystem              Size       Used      Avail  Capacity   Mounted on
/dev/ad1s1a             217M        98M       101M       49%  /
devfs                   1.0K       1.0K         0B      100%  /dev
devfs                   1.0K       1.0K         0B      100%  /dev/
/dev/md0                 26M        26M         0B      100%  
/packages/mnt/jbase
/dev/md1                110M       110M         0B      100%  
/packages/mnt/jkernel-9.0R2.10
/dev/md2                9.3M       9.3M         0B      100%  
/packages/mnt/jpfe-M7i-9.0R2.10
/dev/md3                3.7M       3.7M         0B      100%  
/packages/mnt/jdocs-9.0R2.10
/dev/md4                 35M        35M         0B      100%  
/packages/mnt/jroute-9.0R2.10
/dev/md5                 10M        10M         0B      100%  
/packages/mnt/jcrypto-9.0R2.10
/dev/md6                 22M        22M         0B      100%  
/packages/mnt/jpfe-common-9.0R2.10
/dev/md7                504M      10.0K       463M        0%  /tmp
/dev/md8                504M       428K       463M        0%  /mfs
/dev/ad1s1e              24M        52K        22M        0%  /config
procfs                  4.0K       4.0K         0B      100%  /proc
/dev/ad1s1f              18G       2.2G        14G       14%  /var

lab at edge-c4> show chassis routing-engine
Routing Engine status:
    Temperature                 29 degrees C / 84 degrees F
    CPU temperature             26 degrees C / 78 degrees F
    DRAM                       256 MB
    Memory utilization          68 percent
    CPU utilization:
      User                       0 percent
      Background                 0 percent
      Kernel                     3 percent
      Interrupt                  1 percent
      Idle                      96 percent
    Model                          RE-5.0
   
    Start time                     2008-04-07 13:06:52 EEST
    Uptime                         1 hour, 8 minutes, 11 seconds
    Load averages:                 1 minute   5 minute  15 minute
                                       0.13       0.05       0.01
Both machines work well in our LAB. This means - routing tables are 
small; very few MP-BGP prefixes, etc.
However it remains questionable if this is stable for production 
networks and how will behave Junos 9.0 with small CF cards and DRAM 
(IGP, many BGP peers and so on). And I doubt you will receive J-TAC 
support in case of need.
My advice is simply upgrade your RE's hardware accordingly.

Regards,
Angel Bardarov


David Ball wrote:
>   You can use 'show system storage' and look for the /dev/ad0* device.
>  Juniper indicates that 9.0+ requires a 1GB CF (though I'd be
> interested to hear if someone has tried it on a 256MB card just for
> kicks).
>
> David
>
>
> On 01/04/2008, GIULIANO (UOL) <giulianocm at uol.com.br> wrote:
>   
>> People,
>>
>> We need to upgrade the JUNOS version of a M7i router.
>>
>> How can I check (via junos cli) the total space and the available space
>> of the compact flash ?
>>
>> The default space for CF in a M7i router is 256 MB ?
>>
>> We need to upgrade the router to 9.0R2.1.
>>
>> Thanks a lot,
>>
>> Giuliano
>>
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>>     
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