Binding a redundant interface set (for example, LR/1) to NSVLAN might cause the NetScaler appliance to become unresponsive
Article ID: CTX204303
Updated On:
Description
If customer has configured Link Redundancy LR/1 for 1/1 and 1/2 interfaces.
Then bind the LR/1 to any other Vlan and bind SNIP to it then it works fine and we do not see any reboot.
If you bind the LR/1 to nsvlan as below:
set ns config -nsvlan 1132 -ifnum LR/1
save and reboot
then we will not be able to login through SSH because we will get the error: "nsnet_connect: No such file or directory" and "Invalid password"
The moment the changes have been made and the Netscaler is rebooted the Netscaler could not be logged in back.
Resolution
More information about Redundant links can be found below on our docs.citrix.com website:
http://docs.citrix.com/en-us/netscaler/11/networking/interfaces/redundant-interface-set.html
To reproduce the issue following are the steps and configuration:
a) Create LR/1 with 1/1 interface.
b) Then use the following command to bind the LR/1 to nsvlan:
set ns config -nsvlan 2 -ifnum LR/1
c) Save config and reboot Netscaler.
Below is the config for reference:
d) Once rebooted NSIP will be unreachable.
e) From console when we try to login we get below error:
If we bind the LR/1 to normal VLAN and not nsvlan it works fine:
> sh run | grep -i LR/1
set interface 1/1 -throughput 0 -bandwidthHigh 0 -bandwidthNormal 0 -intftype "Xen Virtual" -ifnum LR/1
add channel LR/1 -lamac ba:17:cc:95:d5:4b -throughput 0 -bandwidthHigh 0 -bandwidthNormal 0
set channel LR/1 -lamac ba:17:cc:95:d5:4b -throughput 0 -lrMinThroughput 0 -bandwidthHigh 0 -bandwidthNormal 0
bind channel LR/1 1/1
bind vlan 56 -ifnum LR/1
> sh vlan
1) VLAN ID: 1
Link-local IPv6 addr: fe80::98ac:13ff:fe9f:7a87/64
Interfaces : LO/1
2) VLAN ID: 56 VLAN Alias Name:
Channels : LR/1
Done
Solution:
==
This issue is fixed in 11.0-64+ builds
http://docs.citrix.com/en-us/netscaler/11/networking/interfaces/redundant-interface-set.html
To reproduce the issue following are the steps and configuration:
a) Create LR/1 with 1/1 interface.
b) Then use the following command to bind the LR/1 to nsvlan:
set ns config -nsvlan 2 -ifnum LR/1
c) Save config and reboot Netscaler.
Below is the config for reference:
d) Once rebooted NSIP will be unreachable.
e) From console when we try to login we get below error:
If we bind the LR/1 to normal VLAN and not nsvlan it works fine:
> sh run | grep -i LR/1
set interface 1/1 -throughput 0 -bandwidthHigh 0 -bandwidthNormal 0 -intftype "Xen Virtual" -ifnum LR/1
add channel LR/1 -lamac ba:17:cc:95:d5:4b -throughput 0 -bandwidthHigh 0 -bandwidthNormal 0
set channel LR/1 -lamac ba:17:cc:95:d5:4b -throughput 0 -lrMinThroughput 0 -bandwidthHigh 0 -bandwidthNormal 0
bind channel LR/1 1/1
bind vlan 56 -ifnum LR/1
> sh vlan
1) VLAN ID: 1
Link-local IPv6 addr: fe80::98ac:13ff:fe9f:7a87/64
Interfaces : LO/1
2) VLAN ID: 56 VLAN Alias Name:
Channels : LR/1
Done
Solution:
==
This issue is fixed in 11.0-64+ builds
Problem Cause
There was no way to handle for LR (Redundant links) in nsvlan. From 11.0-64+ builds this feature is added.
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