[j-nsp] Experience of Adding New RE in M20

[Mustafa Golam -]

One of my customer is using M20 as GGSN in their GSM network.
They had two RE and Primary RE got HW problem so they unplugged it
from Router. Now they have got their replacement HW from JTAC.

What would be the procedure to adding New RE to GGSN (M20)
without interrupting service? JUNOS version of New RE is 9.5 where
as currently running RE's 8.0.
I've search Juniper site and have gone through the documents.

Sharing practical experience would be great for me.


Please advice. If you need any further information, let me know.

Node information as bellow:
user at GGSN01-Re1> show chassis routing-engine

Routing Engine status:

  Slot 1:

    Current state                  Master

    Election priority              Master

    Temperature                 25 degrees C / 77 degrees F

    CPU temperature             23 degrees C / 73 degrees F

    DRAM                      2048 MB

    Memory utilization          13 percent

    CPU utilization:

      User                       0 percent

      Background                 0 percent

      Kernel                     0 percent

      Interrupt                  0 percent

      Idle                     100 percent

    Model                          RE-3.0

    Serial ID                      P13004201004

    Start time                     2009-05-25 09:39:17 WAT

    Uptime                         9 days, 7 hours, 16 minutes, 38 seconds

    Load averages:                 1 minute   5 minute  15 minute

                                       0.02       0.01       0.00



user at GGSN01-Re1> show version

Hostname: DOGGSN01-Re1

Model: m20

JUNOS Base OS boot [8.0-20071208.0]

JUNOS Base OS Software Suite [8.0-20071208.0]

JUNOS Kernel Software Suite [8.0-20071208.0]

JUNOS Packet Forwarding Engine Support (M20/M40) [8.0-20071208.0]

JUNOS Routing Software Suite [8.0-20071208.0]

JUNOS Online Documentation [8.0-20071208.0]

JUNOS Crypto Software Suite [8.0-20071208.0]

Ericsson Juniper Networks Mobile IP GGSN Software [8.0-20071208.0]





user at GGSN01-Re1# show chassis redundancy

routing-engine 0 backup;

routing-engine 1 master;

failover {

    on-loss-of-keepalives;

    on-disk-failure;

}


Thanks in advance,
Mustafa