This article describes the issue of a MX device (with Enhanced SCB) being displayed as Model: olive in the output of show version .
After downgrading a new MX device, from Junos 11.4 to 10.4, the output of show version displays it as Model: olive . The output of show chassis hardware displays the error: Unrecognized command error message and some other show commands do not work as expected. For example: root@MX240-router> show version detail no-forwarding Hostname: MX240-router Model: olive JUNOS Base OS boot [10.4R7.5] JUNOS Base OS Software Suite [10.4R7.5] JUNOS 64-bit Kernel Software Suite [10.4R7.5] JUNOS Crypto Software Suite [10.4R7.5] JUNOS Packet Forwarding Engine Support (M/T Common) [10.4R7.5] JUNOS Packet Forwarding Engine Support (M20/M40) [10.4R7.5] JUNOS Online Documentation [10.4R7.5] JUNOS Voice Services Container package [10.4R7.5] JUNOS Border Gateway Function package [10.4R7.5] JUNOS Services AACL Container package [10.4R7.5] JUNOS Services LL-PDF Container package [10.4R7.5] JUNOS Services PTSP Container package [10.4R7.5] JUNOS Services Stateful Firewall [10.4R7.5] JUNOS Services NAT [10.4R7.5] JUNOS Services Application Level Gateways [10.4R7.5] JUNOS Services Captive Portal and Content Delivery Container package [10.4R7.5] JUNOS Services RPM [10.4R7.5] JUNOS AppId Services [10.4R7.5] JUNOS IDP Services [10.4R7.5] JUNOS Runtime Software Suite [10.4R7.5] JUNOS Routing Software Suite [10.4R7.5] KERNEL 10.4R7.5 #0 built by builder on 2011-09-08 04:50:27 UTC (snip) root@MX240-router> show chassis hardware detail no-forwarding error: Unrecognized command
Page 78 of the Junos 11.4 PDF Release Notes states the following: "Starting with Release 11.4, Junos OS supports the Enhanced MX SCB"
Upgrade to 11.4 or higher, and check the output of show chassis hardware to verify if the router has Enhanced MX SCB's installed. An MX with Enhanced SCB's will have to run Junos 11.4 or later.
lab@router> show chassis hardware Hardware inventory: Item Version Part number Serial number Description Chassis xxxxxxxxxxxx MX240 Midplane REV 07 760-021404 xxxxxxxx MX240 Backplane FPM Board REV 04 760-021392 xxxxxxxx Front Panel Display PEM 0 Rev 09 740-029970 xxxxxxxxxxx PS 1.4-2.52kW; 90-264V AC in PEM 1 Rev 09 740-029970 xxxxxxxxxxx PS 1.4-2.52kW; 90-264V AC in PEM 2 Rev 09 740-029970 xxxxxxxxxxx PS 1.4-2.52kW; 90-264V AC in PEM 3 Rev 09 740-029970 xxxxxxxxxxx PS 1.4-2.52kW; 90-264V AC in Routing Engine 0 REV 06 740-031116 xxxxxxxxxx RE-S-1800x4 CB 0 REV 14 750-031391 xxxxxxxx Enhanced MX SCB