|
Configuration Parameter |
Details |
Recommended Value |
|
HTTP Listening port |
This is the port that IWSVA listens on to receive connections. |
80 |
|
Router IP address |
Detail which router or switch to communicate with via WCCP |
Type in the router or switch IP address |
|
Password |
Password for WCCP authentication |
Type in the password for the WCCP authentication |
|
Auto-negotiate |
Provides automatic negotiation of the forwarding method and the assignment
method. |
Select Enable (default.) |
Note:
If you select Enable, the Forwarding
and Assignment Methods parameters are grayed out since they are automatically
configured. After the Deployment Wizard finishes, you can see the values
of the auto-negotiated parameters at: Administration
> Network Configuration > WCCP.
- If the route supports L2/GRE as a forwarding method, IWSVA should
select L2 when the router and IWSVA are in the same network segment. (This
takes performance into account.)
- If one route supports L2/GRE as forwarding method, IWSVA should select
GRE when the router and IWSVA are not in the same
network segment.
-If one route supports HASH/MASK as assignment method, IWSVA should
select MASK. (This takes performance into account.)
|
|
WCCP forwarding method |
The WCCP forwarding method determines how intercepted traffic is transmitted
from the WCCP server (IOS) to the WCCP client. |
Select the Generic Routing Encapsulation (GRE) or Layer 2 (L2) for WCCP
forwarding method. GRE is the default. |
|
Note:
GRE forwarding, which is
the default forwarding method, encapsulates the intercepted packet in
an IP GRE header with a source IP address of the WCCP server (IOS) and
a destination IP address of the target WCCP client. This has the effect
of a tunnel, allowing the WCCP server (IOS) to be a multiple Layer 3 hops
away from the WCCP client. L2 forwarding simply rewrites
the destination MAC address of the intercepted packet to equal the MAC
address of the target WCCP client. L2 forwarding requires that the WCCP
server (IOS) is Layer 2 adjacent to the WCCP client
|
|
Assignment method |
WCCP provides packet distribution through two algorithms, Hash and Mask |
Select Hash tables or Mask/value sets as the WCCP assignment method.
Mask is the default |
|
Note:
With the hash assignment,
the router runs a value in the header of the packet it is redirecting
through a hashing function. With mask assignment, each
router/switch in the service group has a table of masks and values that
it uses to distribute traffic across the proxy appliances in the service
group.
|
|
Service Group |
Standard or Dynamic |
Standard—Well-known
services, also referred to as static or standard services, have a fixed
set of characteristics that are known by both IOS and WCCPv2 client devices. Dynamic—Dynamic
services are initially only known to the WCCPv2 clients within the service
group.
|
Note:
For example, a single well-known (standard) service called web-cache has
a Service ID is 0. This service redirects all TCP traffic with a destination
port of 80.
The characteristics of a dynamic service are initially only known to
the WCCPv2 clients within the service group. The characteristics of the
service group are communicated to the IOS devices by the first WCCPv2
client device to join the service group.
|
|
Unique Service ID |
Identifies service groups
Defaults:
Standard service =0 Dynamic service =80
|
Range
Standard
= 0-50 Dynamic
= 51-255
|
|
Anonymous FTP over HTTP |
The email address passed to FTP sites. |
Type in an appropriate email address |