Citrix Hypervisors 8.2 LTSR are unable to add some LUNs
-
Applies to
- SAN
- iSCSI
- MTU 9000 (Jumbo frames)
Issue
- Unable to add LUNs from the NetApp to the Citrix server. NetApp and Citrix servers network ports configured with MTU 9000(Jumbo frames)
- EMS logs show constant iscsi reconnections:
Sat Feb 04 15:34:53 +0100 [node: iswt_admin_thread: iscsi.notice:notice]: ISCSI: New session from initiator iqn.2022-12.com.host:cii_encrypt/od7H7ZjDzCmPd96m/4sqVFqkmlg9J+7s6m=/cii_encrypt at IP addr cii_encrypt/od7H7ZjDzCN2M7G9ZqpXbCND3YnyregBXpiD4=/cii_encrypt- ping iscsi target from the Linux/Citrix with 1500 MTU:
# ping -c 5 10.192.xxx.xxx -M do -s 1450
PING 10.192.xxx.xxx (10.192.xxx.xxx) 1450(1478) bytes of data.
1458 bytes from 10.192.xxx.xxx: icmp_seq=1 ttl=64 time=0.216 ms
1458 bytes from 10.192.xxx.xxx: icmp_seq=1 ttl=64 time=0.354 ms
1458 bytes from 10.192.xxx.xxx: icmp_seq=1 ttl=64 time=0.289 ms
1458 bytes from 10.192.xxx.xxx: icmp_seq=1 ttl=64 time=0.356 ms
1458 bytes from 10.192.xxx.xxx: icmp_seq=1 ttl=64 time=0.362 ms
--- 10.192.xxx.xxx ping statistics ---
5 packets transmitted, 5 deceived, 0% packs loss, time 3999ms
- ping iscsi target from the Linux/Citrix with Jumbo frames(900 MTU):
# ping -c 5 10.192.xxx.xxx -M do -s 8972
PING 10.192.xxx.xxx (10.192.xxx.xxx) 8972(9000) bytes of data.
--- 10.192.xxx.xxx ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 4082ms