Cisco Catalyst 3750 and 2970 Switches: Using Switches with a PS Series Group
3
Notes: Do not enable Jumbo Frames on switches unless Jumbo Frames is also configured
on the NICs; otherwise, behavior may be inconsistent.
To simplify troubleshooting initial deployments, make sure that NICs, switches,
and PS Series storage arrays are fully operational before enabling Jumbo Frames
on the switches and NICs.
• Use VLANs to separate iSCSI SAN traffic from other network traffic. PS Series storage
arrays do not support VLAN tagging.
Detailed information about the previous recommendations is provided later in this document.
3. Set up the servers that will access the PS Series group volumes. Servers require an installed
iSCSI initiator to access group volumes, which are seen on the network as iSCSI targets. A
server can use a software iSCSI initiator and network interface card (NIC) combination or an
iSCSI HBA to access group volumes. See the PS Series QuickStart or Group Administration
manual for information about connecting to volumes.
When configuring a software iSCSI initiator and NIC combination on a server, follow these
recommendations:
• It is recommended that you enable Flow Control on each NIC that handles iSCSI traffic.
Flow Control must also be enabled on the switches that handle iSCSI traffic to obtain the
performance benefit.
• Enable Jumbo Frames on each NIC that handles iSCSI traffic. Jumbo Frames must also
be enabled on the switches that handle iSCSI traffic to obtain the performance benefit (or
reduce CPU overhead) and ensure consistent behavior.
Notes: Do not enable Jumbo Frames on NICs unless Jumbo Frames is also configured on
the switches that handle iSCSI traffic; otherwise, behavior may be inconsistent.
To simplify troubleshooting initial deployments, make sure that NICs, switches,
and PS Series storage arrays are fully operational before enabling Jumbo Frames
on switches and NICs.
Detailed information about the previous recommendations is provided later in this document.
Understanding Switch and Server Recommendations
The following sections provide more information about the switch and server recommendations for
creating a high-performance and highly-available iSCSI SAN using Cisco Catalyst 3750 and 2970
switches and PS Series storage arrays.
Spanning-Tree
For switch ports that connect end nodes (iSCSI initiators or storage array network interfaces), it is
recommended that you do not use Spanning-Tree (STP). However, if you want to use STP or
RSTP (preferable to STP) for switch ports that connect end nodes, it is recommended that you
(15 Seiten)
(38 Seiten)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Kommentare zu diesen Handbüchern