On Wed, Aug 19, 2015 at 12:14:03PM -0700, Michael Loftis wrote: > On Wed, Aug 19, 2015 at 9:09 AM, Chuck Anderson <c...@wpi.edu> wrote: > > On Wed, Aug 19, 2015 at 11:43:43AM -0400, Phil Rosenthal wrote: > >> I suggest you bring this up with your Juniper sales rep :) > >> > >> Juniper is very much driven by customer feedback. > > > > I wonder if these ports are connected to a PFE, or if they are > > direct-to-RE ports. If the latter, they may never be usable as > > revenue ports but they might make it easier for Juniper to implement > > external routing engines or distributed/clustering technologies like > > the TX Matrix Plus with the Line Card Chassis. This is just a guess. > > I personally would actually bet that's what it was/is for. Linking > the chassis internal network that carries the management. It's > probably hanging off the management switching system on the fabric > cards, not on the fabric itself.
I happened to have a spare SCBE2 card so I did a few experiments in the lab. This mentions one XE and one GE port, not two XE ports, so I'm not sure if these are the SCB external SFP+ ports or what: root@mx> show chassis ethernet-switch statistics | find External Link is down on XE port 24 connected to device: External-Ethernet Link is down on GE port 25 connected to device: External-Ethernet root@mx> show chassis ethernet-switch | find External Error reading port 24 connected to device: External-Ethernet Error reading port 25 connected to device: External-Ethernet I can't get those links to say "up" after putting a fiber loop on the SFP+ module, so maybe they are something else. Installing an SFP+ module in the SCB causes this to show up in chassisd log (first port 0 then port 1): Aug 21 12:19:29 bcom_563xx_sfps_autosense: jcs.0 is_present: 0 -> 1 Aug 21 12:19:29 bcom_563xx_sfps_autosense: jcs.0 sfp_new -> true Aug 21 12:19:34 cbd_read_sfp_ideeprom_all: sfp_presence 0x01, cbd_sfp_presence 0x00 Aug 21 12:28:54 bcom_563xx_sfps_autosense: jcs.0 is_present: 1 -> 0 Aug 21 12:28:54 cbd_read_sfp_ideeprom_all: sfp_presence 0x00, cbd_sfp_presence 0x01 Aug 21 12:29:00 bcom_563xx_sfps_autosense: jcs.1 is_present: 0 -> 1 Aug 21 12:29:00 bcom_563xx_sfps_autosense: jcs.1 sfp_new -> true Aug 21 12:29:04 cbd_read_sfp_ideeprom_all: sfp_presence 0x02, cbd_sfp_presence 0x00 and this shows up in "show chassis hardware": CB 1 REV 03 750-055976 xxxxxxxx Enhanced MX SCB 2 Xcvr 1 REV 01 740-031981 xxxxxxxx SFP+-10G-LR I had another thought--aren't these same SCB's used on the big SRX boxes? Maybe these could be used as Control Links for those... _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp