HP StorageWorks Enterprise File Services WAN Accelerator - Manual (Page 75)

HP S TORAGE W ORKS EFS WAN A CCELERATOR M ANAGEMENT C ONSOLE U SER G UIDE 75
2 -
C
ON
FIG
URING
TH
E
HP
EF
S
WA
N
A
C
C
EL
ER
ATO
R
Enabling Failover
Support for WCCP To enable failover support for WCCP groups, define the service group weight to be 0
on the backup HP EFS WAN Accelerator. If one HP EFS WAN Accelerator has a
weight 0, but another one has a non-zero weight, the HP EFS WAN Accelerator with
weight 0 does not receive any redirected traffic. If all the HP EFS WAN Accelerators
have a weight 0, the traffic is redirected equally among them.
For detailed information about enabling failover (backup) support for the HP EFS
WAN Accelerator, see
“Enabling Failover and Synchronized Data Store” on page 66 .
Password Optionally, you can assign a password to the HP EFS WAN
Accelerator. This password must be the same as the
password on the router. (WCCP requires that all routers in a
service group have the same password.) Passwords are
limited to 8 characters.
Priority Specifies the WCCP priority for traffic redirection. If a
connection matches multiple service groups on a router, the
router chooses the service group with the highest priority.
The range is 0-255. The default value is 200.
Weight The weight determines how often the traffic is redirected to a
particular HP EFS WAN Accelerator. A higher weight
redirects more traffic to that HP EFS WAN Accelerator. The
ratio of traffic redirected to a HP EFS WAN Accelerator is
equal to its weight divided by the sum of the weights of all
the HP EFS WAN Accelerators in the same service group.
For example, if there are two HP EFS WAN Accelerators in
a service group and one has a weight of 100 and the other
has a weight of 200, the one with the weight 100 receives 1/
3 of the traffic and the other receives 2/3 of the traffic. The
range is 0-65535. The default value corresponds to the
number of TCP connections your appliance supports.
Encapsulation Scheme Specifies the traffic forwarding and redirection scheme:
Generic Routing Encapsulation (gre) or Layer-2 (l2)
redirection. The either value uses Layer-2 first—if Layer-2
is not supported, gre is used.
Version Specifies WCCP, version 2 support, which can be applied
globally.
Multicast Time to Live
(TTL) If you enable WCCP, version 2 support, you can specify the
TTL boundary for the WCCP protocol packets. The default
value is 5 (global for all service groups).
Source IP Hash, Source Port
Hash, Destination IP Hash,
or Destination Port Hash Specifies the fields the router hashes on. You set the source
and destination IP address and port hash fields after you
have configured WCCP service groups. For detailed
information, see
“To edit a WCCP service group settings” on
page 78 .
Source, Destination If the source or destination port is set, the router only
redirects TCP traffic with the same source or destination port
that is specified in the Ports list. You set the source and
destination ports after you have configured WCCP service
groups. For detailed information, see
“To edit a WCCP
service group settings” on page 78 .
Field Description