Switching

Hello all

I have a courious problem with my EX4200.

When I connect a cable on a port (ge-0/0/1), the port is blinking (like up), but on the EX4200, it is still up/down (CLI, et red in j-Web). so the port is unusable.

manager@SW-JADMIN> show interfaces ge-0/0/1
Physical interface: ge-0/0/1, Enabled, Physical link is Down
  Interface index: 130, SNMP ifIndex: 118
  Link-level type: Ethernet, MTU: 1514, Speed: Auto, Duplex: Auto, BPDU Error: None,
  MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Disabled,
  Auto-negotiation: Enabled, Remote fault: Online
  Device flags   : Present Running
  Interface flags: Hardware-Down SNMP-Traps Internal: 0x0
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Current address: 00:26:88:79:42:c1, Hardware address: 00:26:88:79:42:c1
  Last flapped   : Never
  Input rate     : 0 bps (0 pps)
  Output rate    : 0 bps (0 pps)
  Active alarms  : LINK
  Active defects : LINK

  Logical interface ge-0/0/1.0 (Index 66) (SNMP ifIndex 119)
    Flags: Device-Down SNMP-Traps Encapsulation: ENET2
    Input packets : 0
    Output packets: 0
    Protocol eth-switch
      Flags: None

{master:0}
manager@SW-JADMIN> show configuration interfaces ge-0/0/1
ether-options {
    no-flow-control;
}
unit 0 {
    family ethernet-switching {
        port-mode access;
        vlan {
            members VLAN50;
        }
    }
}

Any idea ?

Thanks for any answer.

James

Hello there,

Please post the following printout:

show interfaces ge-0/0/1 media detail | no-more

 Specifically I am interested in autonegotiation section:

  Autonegotiation information:
    Negotiation status: Complete
    Link partner:
        Link mode: Full-duplex, Flow control: None, Remote fault: OK, Link partner Speed: 1000 Mbps
    Local resolution:
        Flow control: None, Remote fault: Link OK

HTH

Rgds

Alex 

Hello Alex

Here is the request:

ADMIN> show interfaces ge-0/0/1 media detail | no-more
Physical interface: ge-0/0/1, Enabled, Physical link is Down
  Interface index: 130, SNMP ifIndex: 118, Generation: 133
  Link-level type: Ethernet, MTU: 1514, Speed: Auto, Duplex: Auto, BPDU Error: None,
  MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Enabled,
  Auto-negotiation: Enabled, Remote fault: Online
  Device flags   : Present Running
  Interface flags: Hardware-Down SNMP-Traps Internal: 0x0
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: 00:26:88:79:42:c1, Hardware address: 00:26:88:79:42:c1
  Last flapped   : Never
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                    0                    0 bps
   Output bytes  :                    0                    0 bps
   Input  packets:                    0                    0 pps
   Output packets:                    0                    0 pps
   IPv6 transit statistics:
    Input  bytes  :                   0
    Output bytes  :                   0
    Input  packets:                   0
    Output packets:                   0
  Egress queues: 8 supported, 4 in use
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0 best-effort                    0                    0                    0
    1 assured-forw                   0                    0                    0
    5 expedited-fo                   0                    0                    0
    7 network-cont                   0                    0                    0
  Active alarms  : LINK
  Active defects : LINK
  MAC statistics:                      Receive         Transmit
    Total octets                             0                0
    Total packets                            0                0
    Unicast packets                          0                0
    Broadcast packets                        0                0
    Multicast packets                        0                0
    CRC/Align errors                         0                0
    FIFO errors                              0                0
    MAC control frames                       0                0
    MAC pause frames                         0                0
    Oversized frames                         0
    Jabber frames                            0
    Fragment frames                          0
    Code violations                          0
  Autonegotiation information:
    Negotiation status: Incomplete
  Packet Forwarding Engine configuration:
    Destination slot: 0

  Logical interface ge-0/0/1.0 (Index 66) (SNMP ifIndex 119) (Generation 131)
    Flags: Device-Down SNMP-Traps Encapsulation: ENET2
    Traffic statistics:
     Input  bytes  :                    0
     Output bytes  :                    0
     Input  packets:                    0
     Output packets:                    0
    Local statistics:
     Input  bytes  :                    0
     Output bytes  :                    0
     Input  packets:                    0
     Output packets:                    0
    Transit statistics:
     Input  bytes  :                    0                    0 bps
     Output bytes  :                    0                    0 bps
     Input  packets:                    0                    0 pps
     Output packets:                    0                    0 pps
    Protocol eth-switch, Generation: 147, Route table: 0
      Flags: None

{master:0}
ADMIN>

Autoneg info seems "incomplete"

Any idea ?

Thanks

James

Hello,

I think the issue is clear: the other end is not properly autonegotiating or not autonegotiating at all.

Most probably autoneg is disabled on the remote box. In this case you have to find out what this remote box supports in terms of speed/duplex and set EX ge-0/0/1 to these exact values; or re-enable autoneg on the remote end if it is under your control.

Also check what kind of cable is required: SMF/MMF if it is fiber or cross/straight if it is copper.

Some boxes also disable MDI/MDIX if autoneg is disabled so You might want to try a couple of copper cables, cross and straight, if this port has copper SFP.

HTH

Rgds

Alex

Hello Alex

i ise only cat 6 cable (no optical).

I've change many neg type but it seems the same. Nevertheless, i've plugged it on another port 1/0/12 (there are 4 EX4200 stacked), and the port is seen up/up by the EX4200.

ADMIN> show interfaces ge-1/0/12 media detail | no-more
Physical interface: ge-1/0/12, Enabled, Physical link is Up
  Interface index: 217, SNMP ifIndex: 232, Generation: 268
  Link-level type: Ethernet, MTU: 1514, Speed: Auto, Duplex: Auto, BPDU Error: None,
  MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Enabled,
  Auto-negotiation: Enabled, Remote fault: Online
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x0
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: 00:26:88:79:42:cc, Hardware address: 00:26:88:79:42:cc
  Last flapped   : 2011-06-20 07:43:05 UTC (00:10:33 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :               501882                    0 bps
   Output bytes  :                    0                    0 bps
   Input  packets:                 3737                    0 pps
   Output packets:                    0                    0 pps
   IPv6 transit statistics:
    Input  bytes  :                   0
    Output bytes  :                   0
    Input  packets:                   0
    Output packets:                   0
  Egress queues: 8 supported, 4 in use
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0 best-effort                    0                    0                    0
    1 assured-forw                   0                    0                    0
    5 expedited-fo                   0                    0                    0
    7 network-cont                   0                    0                    0
  Active alarms  : None
  Active defects : None
  MAC statistics:                      Receive         Transmit
    Total octets                        501882                0
    Total packets                         3737                0
    Unicast packets                        475                0
    Broadcast packets                      314                0
    Multicast packets                     2948                0
    CRC/Align errors                         0                0
    FIFO errors                              0                0
    MAC control frames                       0                0
    MAC pause frames                         0                0
    Oversized frames                         0
    Jabber frames                            0
    Fragment frames                          0
    Code violations                          0
  Autonegotiation information:
    Negotiation status: Complete
    Link partner:
        Link mode: Full-duplex, Flow control: None, Remote fault: OK,
        Link partner Speed: 1000 Mbps
    Local resolution:
        Flow control: Symmetric, Remote fault: Link OK
  Packet Forwarding Engine configuration:
    Destination slot: 1
  CoS information:
    Direction : Output
    CoS transmit queue               Bandwidth               Buffer Priority   Limit
                              %            bps     %           usec
    0 best-effort            95      950000000    95             NA      low    none
    7 network-control         5       50000000     5             NA      low    none

ADMIN>

The problem is, even, i remove the cable cat6 from this port, the port is seen up/up by EX4200.

same state when show command...

whereas first port is still seen imcomplete.

is it possible that the junos release is too old (10.0R1.8), or corrupted ?

another difference between these 2 interface state (on different switch ex4200), is that the ge-1/0/12 use PFE1, whereas the ge-0/0/1 use PFE 0.

what is your idea ?

Thanks

James

Hello,

Does the ge-0/0/1 have POE enabled?

Also, please have a look at what EX software release is currently recommended by JTAC

https://www.juniper.net/customers/csc/software/junos_software_versions.jsp

HTH

Rgds

Alex

Hello Alex

I think i've found the problem...

as 4 switches are stacked, interface numbers where not followed, i mean ge-0/0/0 not on first switch, but 3nd one etc...

so each time I do a test, i wasn't on the good switch. i saw the problem only when i connect on back to back 2 port of the same switch.

I am confused to make you spend so much time to help me.

Anyway, thanks a lot for your patience.

hope this post help somebody.

James

Hello,

No worries, everyone makes mistakes

Kudos dispatched for being brave and finding the root cause  

Cheers

Alex