HP Cisco MDS 9120 Cisco MDS 9000 Family Release Notes for Cisco MDS SAN-OS Rel - Page 22

Limitations and Restrictions Send documentation comments to [email protected] CWDM SFPs The 2-Gbps CWDM SFPs do not have have a maximum speed set in memory and they negotiate to 4-Gbps on modules that support the higher speed. As a result, the link comes up and appears to work, but then becomes disabled and connectivity problems occur. To correct this problem, both sides of the connection must have their speed hard coded to 2-Gbps. Fabric Manager Observe the following limitations or restrictions for the Cisco SAN-OS Release 3.1(2a) for Fabric Manager: • The Microsoft Security Patch MS06-040 is known to break applications with a large heap memory. If you increase any Java application's heap (including Fabric Manager) beyond 64 M, we recommend you do not apply this patch. • If port 80 on the switch is blocked and you are using VPN, FM cannot detect NAT addresses. The timeout for URL connections is set for 500ms. iSNS Observe the following behaviors regarding the iSNS server and client: • The iSNS feature does not support a graceful downgrade from Cisco MDS SAN-OS Release 3.1(2a) to any earlier SAN-OS release. Prior to a downgrade from Cisco SAN-OS 3.1(2a), disable the MDS iSNS server and remove all configurations associated with the MDS iSNS client. • The Cisco MDS 9000 switches iSNS server does not support registration, query, or state change information from an actual iSCSI target. • The iSNS client registers all targets outside the permitted VSAN if you configure the iSCSI interface and targets to be part of different VSANs. • The iSNS client functionality on Cisco MDS 9000 switches does not work on VRRP interfaces. • The iSNS client functionality on Cisco MDS 9000 switches does not support registration of iSLB initiators. Interop Mode 4 Support Cisco MDS SAN-OS Release 3.1(2a) does not support interop mode 4 on the Cisco MDS 9124 Switch, the Cisco Fabric Switch for HP c-Class BladeSystem, and the Cisco Fabric Switch for IBM BladeCenter. MTU Size Limitation The Cisco MDS 9216i switch and MPS-14/2 module do not support an MTU size greater than 8000 bytes. An attempt to set the MTU size greater than 8000 bytes will result in an error. As a workaround, reset the value of the MTU size (576 to 8000 bytes) and issue the no shutdown command on the interface for normal operation. Cisco MDS 9000 Family Release Notes for Cisco MDS SAN-OS Release 3.1(2a) 22 OL-12208-03