[j-nsp] Half Duplex Routing Engine m40?

[Paul Goyette]

The M40 internal PFE-to-RE link (fxp1) runs only in
half-duplex mode.  

-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net]On Behalf Of Dennis Ponne
Sent: Wednesday, February 16, 2005 11:15 AM
To: juniper-nsp at puck.nether.net
Cc: noc at netholding.nl
Subject: [j-nsp] Half Duplex Routing Engine m40?


Hi,

I found something what I think is not correct.

The routing-engine on our M20 box on FXP1 has a full-duplex link.

dennis at m20.intxn.be.as24730.net> show interfaces fxp1
Physical interface: fxp1, Enabled, Physical link is Up
  Interface index: 2, SNMP ifIndex: 2
  Type: Ethernet, Link-level type: Ethernet, MTU: 1514, Speed: 100mbps
  Device flags   : Present Running
  Interface flags: SNMP-Traps
  Link type      : Full-Duplex
  Link flags     : 4
  Current address: 00:a0:a5:12:1c:1e, Hardware address: 00:a0:a5:12:1c:1e
  Last flapped   : Never
  Input packets : 332905148
  Output packets: 994816558


Now I check both our M40's and check this out:

Physical interface: fxp1, Enabled, Physical link is Up
  Interface index: 2, SNMP ifIndex: 2
  Type: Ethernet, Link-level type: Ethernet, MTU: 1514, Speed: 100mbps
  Device flags   : Present Running
  Interface flags: SNMP-Traps
  Link type      : Half-Duplex
  Link flags     : 4
  Current address: 00:a0:a5:12:2b:53, Hardware address: 00:a0:a5:12:2b:53
  Last flapped   : Never
  Input packets : 1643478
  Output packets: 5153017


What we have we do a total on this M40 box 2.9 - 3.1 gigabit/s of traffic
outgoing and incomming 600 - 700 mbit/s on our transit/peering interfaces.

We run 197 peers on this box and the avaible memory is 351MB, this box has
768MB of ram inside and uses a RE-2.

The total pps is:

250.000kpps average, Load in day time 300.000kpps Load up to 320.000kpps.

But the strange is that we have packet loss, it does not matter wich JunOS
we use, the packet loss to the router is heavy, but 9 of 10 times after
the router the ping is normal. But on the M20 this is not an issue.

How can I force the FXP1 to be 100 FDX? Threw the software:

edit interface fxp1
set link-mode full-duplex

Does not work.

JUNOS Base OS Software Suite [7.0R2.7]

Hardware inventory:
Item             Version  Part number  Serial number     Description
Chassis                                53828             M40
Backplane        REV 02   710-001348   AL3546            M40 Backplane
Power Supply A   REV 04   740-000234   001516            AC Power Supply
Power Supply B   REV 04   740-000234   001598            AC Power Supply
Maxicab          REV 08   710-000229   AT3658            Host Maxi CAB
Minicab          REV 03   710-001739   AH8902            M40 Teknor Mini
CAB
Display          REV 08   710-000150   AP2907            M40 Display Board
Routing Engine   REV 01   740-003239   9001009622        RE-2.0
SCB              REV 02   710-001838   AP9305            Internet
Processor IIv1
FPC 0            REV 01   710-001292   AN7304            FPC
  PIC 0          REV 03   750-002879   AN7060            1x G/E, 1000
BASE-SX
  PIC 1          REV 03   750-002879   AN7060            1x G/E, 1000
BASE-SX
  PIC 2          REV 03   750-002879   AN7060            1x G/E, 1000
BASE-SX
  PIC 3          REV 03   750-002879   AN7060            1x G/E, 1000
BASE-SX
FPC 2            REV 03   710-003308   BC0734            E-FPC
  PIC 0          REV 01   750-001324   AC4850            1x G/E, 1000
BASE-LX
FPC 5            REV 01   710-001292   AF3547            FPC
  PIC 0          REV 03   750-002879   AP1259            1x G/E, 1000
BASE-SX
  PIC 1          REV 03   750-002879   AP1259            1x G/E, 1000
BASE-SX
  PIC 2          REV 03   750-002879   AP1259            1x G/E, 1000
BASE-SX
  PIC 3          REV 03   750-002879   AP1259            1x G/E, 1000
BASE-SX
FPC 7            REV 01   710-001292   AJ0968            FPC
  PIC 0          REV 03   750-000603   AG7521            4x OC-3 SONET,
SMIR
  PIC 2          REV 08   750-001072   AH1073            1x G/E, 1000
BASE-SX

dennis at m40.ams.gs> show system uptime
Current time: 2005-02-16 20:14:55 CET
System booted: 2005-01-26 23:09:08 CET (2w6d 21:05 ago)
Protocols started: 2005-01-26 23:10:23 CET (2w6d 21:04 ago)
Last configured: 2005-02-16 19:49:19 CET (00:25:36 ago) by dennis
8:14PM CET up 20 days, 21:06, 1 user, load averages: 0.02, 0.14, 0.22

The question is how can make sure that a router that is no heavy loaded
towards it's routing engine can ping back in time? How do I set this
interface to be full-duplex?

Thanks in advance,

Dennis Ponne

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