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What is the difference between SRX-MP-1SFP and SRX-MP-1SFP-GE mPIMs?

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Knowledge Base ID: KB19913
Last Updated: 24 Oct 2011
Version: 6.0

Summary:
What is the difference between SRX-MP-1SFP and SRX-MP-1SFP-GE mPIMs which are both 1-port SFP GE mPIMs for SRX2xx platforms?

Problem or Goal:
This applies to the following models / part numbers.
  • SRX-MP-1SFP / 750-029145
  • SRX-MP-1SFP-GE / 750-032730

SRX mPIMs are applicable to the following platforms.
  • SRX210
  • SRX220
  • SRX240

Cause:

Solution:
The SRX-MP-1SFP-GE is a newer model meant to replace the original SRX-MP-1SFP mPIMs. Both can support same SFP optic modules. Below are some of the differences between the two models.

SRX-MP-1SFP
  • Supported since JUNOS 9.5
  • Supported on SRX210 and SRX240, not supported on SRX220
  • Cannot be used as member of reth interface in a chassis cluster
  • No jumbo frame support
  • Limited to 100Mbps due to port connection to backplane limitation
  • Cannot be used for fabric link in a chassis cluster

SRX-MP-1SFP-GE
  • Supported since JUNOS 10.4
  • Supported on SRX210, SRX220 and SRX240
  • Can be used as member of reth interface in a Chassis Cluster
  • Supports jumbo frames up to MTU 9010 bytes
  • GE backplane connection to allow near 1GB line rate
  • For SRX Series Chassis Clusters made up of SRX100, SRX210, SRX220,
    SRX240, or SRX650 devices, SFP interfaces on Mini-PIMs cannot be used
    as the fabric link.  This functionality will be supported starting with Junos 11.4R1 and onwards.


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