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Ethernet Switching

QFX 5100 - QSFP Ports don't come up automatically*

[ Edited ]
a week ago

Hello,

 

We have a QFX 5100 connected to a MX480 via 2x QSFP to 4x SFP+  Breakout cables.

 

We have an issue where after a power failure or powering on both the MX480 and QFX at the same time the QSFP ports do not come up automatically even after 20 minutes. We have to unplug the QSFPs and re-connect them for it to come up.
The MX480 shows links on the interfaces connected to the QFX but the QFX does not display any link lights and has the error (on all QSFP ports)

run show interfaces xe-0/0/48:0
error: device xe-0/0/48:0 not found

 

However:
If we power on the MX480 first, wait approx 15mins for it and the line cards to fully boot, and then power on the QFX, the links will come up shortly after the QFX boots. And vica versa; if we power on the QFX wait for it to fully boot, then power on the MX480, it will get a link and be able to ping between the two.


We need the links to establish without manual human input in the event of a power failure where both devices would be booting at the same time.

Is there anything that can be done/configured to resolve this?

 

Config on the QFX relating to the ports/ae going to the MX. (0/0/49 has the same config - ommitted below)

 

show | match 0/0/48 | display set
set interfaces et-0/0/48 unit 0 family ethernet-switching vlan members default
set interfaces et-0/0/48 unit 0 family ethernet-switching storm-control default
set interfaces xe-0/0/48:0 description **
set interfaces xe-0/0/48:0 ether-options 802.3ad ae0
set interfaces xe-0/0/48:1 description **
set interfaces xe-0/0/48:1 ether-options 802.3ad ae0
set interfaces xe-0/0/48:2 description **
set interfaces xe-0/0/48:2 ether-options 802.3ad ae0
set interfaces xe-0/0/48:3 description **
set interfaces xe-0/0/48:3 ether-options 802.3ad ae0
set protocols rstp interface et-0/0/48

set interfaces ae0 aggregated-ether-options link-speed 10g
set interfaces ae0 aggregated-ether-options lacp active
set interfaces ae0 unit 0 family ethernet-switching interface-mode trunk
set interfaces ae0 unit 0 family ethernet-switching vlan members vlan801

Config on the MX480 relating to the ports/ae going to the QFX.

 

set interfaces xe-0/1/0 gigether-options 802.3ad ae2
set interfaces xe-0/1/1 gigether-options 802.3ad ae2
set interfaces xe-0/1/2 gigether-options 802.3ad ae2
set interfaces xe-0/1/3 gigether-options 802.3ad ae2
set interfaces xe-0/1/4 gigether-options 802.3ad ae2
set interfaces xe-0/1/5 gigether-options 802.3ad ae2
set interfaces xe-0/1/6 gigether-options 802.3ad ae2
set interfaces xe-0/1/7 gigether-options 802.3ad ae2
set interfaces xe-3/1/0 gigether-options 802.3ad ae2
set interfaces xe-3/1/1 gigether-options 802.3ad ae2
set interfaces xe-3/1/2 gigether-options 802.3ad ae2
set interfaces xe-3/1/3 gigether-options 802.3ad ae2
set interfaces xe-3/1/4 gigether-options 802.3ad ae2
set interfaces xe-3/1/5 gigether-options 802.3ad ae2
set interfaces xe-3/1/6 gigether-options 802.3ad ae2
set interfaces xe-3/1/7 gigether-options 802.3ad ae2
set interfaces ae2 description **
set interfaces ae2 aggregated-ether-options minimum-links 1
set interfaces ae2 aggregated-ether-options link-speed 10g
set interfaces ae2 aggregated-ether-options lacp active
set interfaces ae2 unit 0 family bridge interface-mode trunk
set interfaces ae2 unit 0 family bridge vlan-id-list 801
set interfaces ae2 unit 0 family bridge vlan-id-list 804

 

1 REPLY
Ethernet Switching

Re: QFX 5100 - QSFP Ports don't come up automatically*

a week ago

Hi,

 

Not sure what line cards you have or what versions of softare you are running. I have however experienced the same issue after a link flap... Everything would work fine initially then the interface would stay down after a flap and the MX line card would need to be offlined to restore service.

 

https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1259930

 

After upgrading to a later version of software the optic/mic would recover after a link flap.

 

If you can provide more information we may be able to assist further.

 

Thanks

Tim