Tag Archives: junos

Enable LLDP on JUNOS

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By default LLDP is not running on JUNOS, but it is trivially easy to enable. To activate LLDP on all interfaces:

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root@svalinn# set protocols lldp interface all

And to get information on both the local lldp status, and the neighbours:

root@svalinn# run show lldp local-information

LLDP Local Information details

Chassis ID   : 78:19:f7:aa:5e:40
System name  : svalinn
System descr : Juniper Networks, Inc. srx210b , version 12.1X44-D30.4 Build date: 2014-01-11 05:25:31 UTC

System Capabilities
Supported       : Bridge Router
Enabled         : Bridge Router

Interface name    Parent Interface  SNMP Index      Interface description    Status    Tunneling
fe-0/0/7.0        -                 527             fe-0/0/7.0               Up        Disabled

root@svalinn# run show lldp detail

LLDP                   : Enabled
Advertisement interval : 30 seconds
Transmit delay         : 2 seconds
Hold timer             : 4 seconds
Notification interval  : 0 Second(s)
Config Trap Interval   : 0 seconds
Connection Hold timer  : 300 seconds

LLDP MED               : Disabled

Interface      Parent Interface    LLDP        LLDP-MED    Neighbor count
all            -                   Enabled     -           1

Interface      Parent Interface    Vlan-id     Vlan-name
fe-0/0/7.0     -                   5           vlan-oam
LLDP basic TLVs supported:
Chassis identifier, Port identifier, Port description, System name, System
description, System capabilities, Management address.

Supported LLDP 802 TLVs:
MAC/PHY configuration/status, Power via MDI, Link aggregation, Maximum frame
size, Port VLAN tag, Port VLAN name.

root@svalinn# run show lldp neighbors
Local Interface    Parent Interface    Chassis Id          Port info          System Name
fe-0/0/7.0         -                   00:1c:73:61:ae:d7   Ethernet47         tm214.ire.aristanetworks.com

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Dual Root with different versions – JUNOS

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Finally fired up my SRX210 today, and got it going (after a password recovery 🙂 ), but while it was booting I noticed the error:

WARNING: JUNOS versions running on dual partitions are not the same

What this actually means is that the current running version of JUNOS is not the same as the version in the system snapshot i.e. you forgot to create a new snapshot after you upgraded.

Checking this and fixing it is quite trivial:

root@svalinn> show system snapshot media internal
Information for snapshot on       internal (/dev/da0s1a) (backup)
Creation date: Oct 16 19:37:41 2013
JUNOS version on snapshot:
junos  : 12.1X45-D15.5-domestic
Information for snapshot on       internal (/dev/da0s2a) (primary)
Creation date: Jan 31 08:59:22 2014
JUNOS version on snapshot:
  junos  : 12.1X44-D30.4-domestic

root@svalinn> request system snapshot slice alternate
Formatting alternate root (/dev/da0s1a)…
Copying ‘/dev/da0s2a’ to ‘/dev/da0s1a’ .. (this may take a few minutes)
The following filesystems were archived: /

And problem solved 🙂