Citrix ADC MPX/SDX Fortville NIC Err-Disabled when LLDP Is enabled on Peer Switch/Router

If Citrix ADC is connected to a switch/router via Fortville NIC (For example 10G port on MPX 8900), interface will show UP for a moment then go to Err-Disabled state. Running “show interface” command on ADC, you can find ADC Fortville NIC is in Err-Disabled State, along with TX Stall and Hang counts. Issue can be reproduced even if the NIC is bound to a channel.

For example:

Interface 10/1 (10G Ethernet, SR, 10 Gbit) #9 Error-Disabled flags=0x4004110 <ENABLED, DOWN(PWR OFF), BOUND to LA/2, down, autoneg, 802.1q> MTU=1500, MAC=00:e0:ed:dd:ff:22, downtime 0h11m36s Requested: media AUTO, speed AUTO, duplex AUTO, fctl OFF, throughput 0 LLDP Mode: NONE, LR Priority: 1024 RX: Pkts(469) Bytes(383025) Errs(0) Drops(469) Stalls(0) TX: Pkts(139) Bytes(5838) Errs(0) Drops(12) Stalls(38) NIC: InDisc(0) OutDisc(0) Fctls(0) Stalls(0) Hangs(25) Muted(0) Bandwidth thresholds are not set. Rx Ring: Configured size=2048, Actual size=512, Type: Elastic

Enable/Disable the interface can’t recover, but reboot can bring UP state back. However, issue will happen again.

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