| Configuration Parameter |
Details |
Recommended Value |
| HTTP Listening port |
This is the port that IWSVA listens on to receive connections. |
8080 |
| 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
|
