I need help to understand a enterasys router configuration

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Hello,

we have a Enterasys Matrix E5 chassis, that contains four switches (5H152-50) and a router (5SSRM-02).

Here are a few lines extracted from the router configuration file  :

stp enable port gi.(1-2).(1.2)
vlan make trunk-port gi.(1-2).(1.2)
vlan create VLAN1 port-based id 80
vlan add ports gi.(1-2).(1.2) to VLAN1
.......

When I use the command   SHOW MAU-statistics all-ports, the ports gi.(1-2).(1.2) are not displayed, and only the front ports appear.


Can you confirm me that the ports gi.1.1, gi.1.2, gi.2.1 and gi.2.2 are backplane ports ?
Do you know a documentation on the use of this ports ?

Could you tell me why, when we use the SHOW MAU-statistics all-ports command, these ports are not displayed ?

Thank you very much.

Bests regards.
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Posted 3 years ago

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Paul Poyant, Employee

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The 5SSRM-02 module for a five-slot Matrix E5 chassis is functionally a SmartSwitch Router SSR-2-B128, and went End of Support over 10 years ago - so please understand that information and assistance for this product is very limited, even on this forum.

5SSRM-02 ports gi.1.1, gi.1.2, gi.2.1, and gi.2.2 correspond to backplane ports 1, 2, 3, and 4. The relationship can be readily seen by use of the command "system show 6000-backplane-status". Mau-statistics do not apply to backplane ports.
Thank you Paul for this command I didn't know !
So, this router has only 4 backplane ports, one for each other slots. Is it correct ?

This router is connected to 4 switches. When I use the device manager of Netsight, only one switch has a smarttrunking port. Yet our vlans are spread across the 4 switches. And there are no trunk in front ports.
Could you tell me why only one switch has a smarttrunk port, and not the fours ?

Thank you again.
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Paul Poyant, Employee

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Yes, that is correct.  The 5Hs can switch among themselves, and this 5SSRM could optionally route among them if their direct connection backplane ports are disabled to force the 5SSRM as the sole intermediary.

Any smarttrunking port (equivalent to a LAG) would have been user-created, so look to the switch configurations for that.  It should be on two or more front ports, since that's the only ports that could be trunked.  The smarttrunking port may also be 802.1Q trunked so that it can serve as the single uplink port for all VLANs on the chassis.
Hello,

we have several VLANs that are spread over the 4 switches.  So a trunk must be used.
But no front port is used to link the switches.  Yet you wrote "It should be on two or more front ports, since that's the only ports that could be trunked".
I don't really understand.
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Paul Poyant, Employee

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Here we get into phraseology.  When I spoke of only front ports being capable of trunking, I was referring to SmartTrunking, aka Link Aggregation (LAG).  When you are tagging multiple VLANs over a Port or a SmartTrunk, that's 802.1Q Trunking - which is a different matter entirely.

Backplane ports would not be SmartTrunked, but are usually 802.1Q Trunked to permit the intercommunication of multiple VLANs within multiple slots of a chassis.

Hopefully that's clearer.
Yes it is clearer ! Thank you.
Thank you for you very precise answer.
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Paul Poyant, Employee

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The Matrix E5 5SSRM-02 is a variation on the SmartSwitch Router SSR-2-B128 (128 MB memory), which in turn is roughly equivalent to the X-Pedition XP-2400-256 (256 MB memory). Matrix E5 manuals are no longer available, but this set of XP manuals in our Legacy Products section might be generally useful:
https://extranet.extremenetworks.com/downloads/Pages/X-Pedition.aspx, Documentation tab, Hardware Manuals -> X-Pedition 2400 Router.