[j-nsp] Interfaces with copper SFPs not getting torn down when partner is disabled (not correctly recognizing Media type?)

[Graham Brown]

Hi Jason,

Are these SFPs Juniper supplied or third party? Over the years there have
been many documented issues with Base-T SFPs, where you lose physical and
they report as being up.

IIRC, the Juniper supplied SFPs are ok and I have tested third party ones
that do work, but it's a little hit and miss.

NB: I have not tested the EX9200.

HTH,
Graham

Graham Brown
Twitter - @mountainrescuer <https://twitter.com/#!/mountainrescuer>
LinkedIn <http://www.linkedin.com/in/grahamcbrown>

On 19 July 2016 at 08:04, Jason Lixfeld <jason-jnsp at lixfeld.ca> wrote:

> Hey there,
>
> I’m messing around with a lab EX9204 with a EX9200-40x1G-SFP running
> 14.2R4.9
>
> I’ve got two ports (on the same box) connected together with 10/100/1000T
> SFPs in each.
>
> ario at lab01.juniper# show interfaces | display set
> set interfaces ge-0/1/0 unit 0
> set interfaces ge-0/3/0 unit 0
>
> ario at lab01.juniper# run show lldp neighbors
> Local Interface    Parent Interface    Chassis Id          Port info
>     System Name
> ge-0/1/0           -                   30:7c:5e:96:ac:80   ge-0/3/0
>    lab01.juniper
> ge-0/3/0           -                   30:7c:5e:96:ac:80   ge-0/1/0
>    lab01.juniper
>
> [edit]
> ario at lab01.juniper#
>
> I’m noticing that if I disable either interface, it’s partner interface
> does not go down.  I’m not talking about Ethernet OAM, just simple layer 1
> link detection with copper SFPs.  In my past experiences with various Cisco
> platforms, this works with no special configuration required.  One thing of
> interest is that the box thinks the media type is Fiber.
>
> ario at lab01.juniper# set interfaces ge-0/1/0 disable
>
> [edit]
> ario at lab01.juniper# commit
> commit complete
>
> [edit]
> ario at lab01.juniper# Jul 18 15:56:42.333 2016  lab01.juniper mib2d[2006]:
> %DAEMON-4-SNMP_TRAP_LINK_DOWN: ifIndex 558, ifAdminStatus down(2),
> ifOperStatus down(2), ifName ge-0/1/0
>
>
> [edit]
> ario at lab01.juniper# run show interfaces ge-0/1/0
> Physical interface: ge-0/1/0, Administratively down, Physical link is Down
>   Interface index: 149, SNMP ifIndex: 558
>   Link-level type: Ethernet, MTU: 1514, MRU: 0, LAN-PHY mode, Speed:
> 1000mbps, BPDU Error: None, MAC-REWRITE Error: None, Loopback: Disabled,
> Source filtering: Disabled,
>   Flow control: Enabled, Auto-negotiation: Enabled, Remote fault: Online,
> Media type: Fiber
>   Device flags   : Present Running Down
>   Interface flags: Hardware-Down Down SNMP-Traps Internal: 0x4000
>   Link flags     : None
>   CoS queues     : 8 supported, 8 maximum usable queues
>   Current address: 30:7c:5e:96:a5:65, Hardware address: 30:7c:5e:96:a5:65
>   Last flapped   : 2016-07-18 15:56:42 EDT (00:00:11 ago)
>   Input rate     : 0 bps (0 pps)
>   Output rate    : 0 bps (0 pps)
>   Active alarms  : LINK
>   Active defects : LINK
>   Interface transmit statistics: Disabled
>
>   Logical interface ge-0/1/0.0 (Index 345) (SNMP ifIndex 570)
>     Flags: Device-Down SNMP-Traps 0x4004000 Encapsulation: ENET2
>     Input packets : 3
>     Output packets: 4
>     Protocol multiservice, MTU: Unlimited
>
> [edit]
> ario at lab01.juniper# run show interfaces ge-0/3/0
> Physical interface: ge-0/3/0, Enabled, Physical link is Up
>   Interface index: 169, SNMP ifIndex: 526
>   Link-level type: Ethernet, MTU: 1514, MRU: 0, LAN-PHY mode, Speed:
> 1000mbps, BPDU Error: None, MAC-REWRITE Error: None, Loopback: Disabled,
> Source filtering: Disabled,
>   Flow control: Enabled, Auto-negotiation: Enabled, Remote fault: Online,
> Media type: Fiber
>   Device flags   : Present Running
>   Interface flags: SNMP-Traps Internal: 0x4000
>   Link flags     : None
>   CoS queues     : 8 supported, 8 maximum usable queues
>   Current address: 30:7c:5e:96:a6:af, Hardware address: 30:7c:5e:96:a6:af
>   Last flapped   : 2016-07-18 14:52:35 EDT (01:04:23 ago)
>   Input rate     : 0 bps (0 pps)
>   Output rate    : 0 bps (0 pps)
>   Active alarms  : None
>   Active defects : None
>   Interface transmit statistics: Disabled
>
>   Logical interface ge-0/3/0.0 (Index 348) (SNMP ifIndex 544)
>     Flags: Up SNMP-Traps 0x4004000 Encapsulation: ENET2
>     Input packets : 4
>     Output packets: 4
>     Protocol multiservice, MTU: Unlimited
>
> [edit]
> ario at lab01.juniper#
>
> Am I missing something somewhere?
>
> Thanks in advance.
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