WAE 512 (ACNS 5.5.5 ) connected to Catalyst WS-C4506 not seen in WCCP

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Jul 10th, 2007
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Network Setup:

[VA]----4506----6500--/\/---[net cloud]

<space >[C!E]< >[V!B]


Legend:

VA - Cache Engine Clients (Vlan 2-VTPA)

VB - Cache Engine Client (Vlan 3-VTPB)

CE - Cache Engine(connectsto Vlan 4-VTPA)



Scenario:

VA and VB needs to access https web servers in Remote Network Cloud. CE should perform transparent https caching using wccp.


Problem: 4506 switch not seeing cache engine/or properly running wccp?


I have a Cisco WAE 512 (ACNS v5.5.5) directly connected to a Cisco Catalyst WS-C4506 switch (cat4500-ipbasek9-mz.122-31.SGA.bin) VA also connects to 4506, both are configured for https caching, but when i would issue

the "sh ip wccp 70 detail" command on the switch , I get:

WCCP Cache-Engine information:

Web Cache ID: x.x.x.x

Protocol Version: 2.0

State: NOT Usable

Redirection: L2

Packet Return: L2

Packets Redirected: 0

Connect Time: 1w1d

Assignment: MASK


It seems that for a cache engine directly connected to this switch, wccp is not working, I really wonder why it would show

"State: NOT Usable"

and

Redirection: L2

Packet Return: L2


but L2 redirection is only supported on 6500 series right?



Suprisingly for 6500, it sees the cache engine thru GRE, and the CE is able to

https cache thru wccp the VB clients https request (VB connects to 6500).

"sh ip wccp 70 detail" @ 6500



WCCP Cache-Engine information Web Cache ID: y.y.y.y

Protocol Version: 2.0

State: Usable

Redirection: GRE

Packet Return: GRE

Assignment: HASH

Initial Hash Info: 00000000000000000000000000000000

00000000000000000000000000000000

Assigned Hash Info: FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

FFFFFFFFFFFFFFFF0000000000000000

Hash Allotment: 192 (75.00%)

Packets Redirected: 0

Connect Time: 00:00:41


Any ideas why WCCP is not working on the 4506 switch? Any suggestions on how to make it work?


thanks,

-dod



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Zach Seils Wed, 07/11/2007 - 05:46
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Daryl,


The WCCP implementation on the 4500/4900 only supports L2 forwarding and mask assignment. The "NOT Usable" state for a CE typically means the CE and router do not agree on the configured methods. Can you please post the WCCP portion of the ACNS configuration?


Thanks,

Zach

daryldano Wed, 07/11/2007 - 06:37
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Hi Seils,


Here it is:



wccp router-list 1

wccp port-list 1 xx yyy zzzz aaaa bbbb

wccp https-cache accept-all

wccp service-number 90 router-list-num 1 port-list-num 1 application https-cache

wccp version 2


#sh wccp content-engines


Content Engine List for Service: WCCPv2 Service 90


IP address =

Routers seeing this Content Engine(1)

#sh wccp routers


Router Information for Service: WCCPv2 Service 90

Routers Configured and Seeing this Content Engine(1)

Router Id Sent To Recv ID

000139B6

Routers not Seeing this Content Engine

-NONE-

Routers Notified of but not Configured

-NONE-

Multicast Addresses Configured

-NONE-



thanks for the help,

-dod

daryldano Wed, 07/11/2007 - 06:40
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Hi Siels,


Do you happen to know if I would connect the WAE to the 6500, the 4500 would be able to see the WAE thru GRE for wccp?


Does 4500 supports GRE for wccp?


Thanks,


-dod

Zach Seils Thu, 07/12/2007 - 00:12
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The 4500 does not support GRE Forwarding.


Zach


Zach Seils Thu, 07/12/2007 - 00:12
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  • Cisco Employee,

Dod,


You are missing the following arguments on the WCCP service configuration:


l2-redirect mask-assign


So the configuration should look like this:


wccp router-list 1

wccp port-list 1 xx yyy zzzz aaaa bbbb

wccp https-cache accept-all

wccp service-number 90 router-list-num 1 port-list-num 1 application https-cache l2-redirect mask-assign

wccp version 2


Thanks,

Zach



daryldano Thu, 07/12/2007 - 02:00
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Hi Zach,


I have tried the config that you suggested but still it didnt work.


I have connected the cache engine to a port in 4500, then assigned it to a vlan.


Would it required that the port to be issued

"no switchport" command

for l2-redirect to work?


thanks,


-dod



Zach Seils Thu, 07/12/2007 - 06:45
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  • Cisco Employee,

Please provide the following output:


IOS/4500:


show ip wccp

show ip wccp 90 detail

show ip wccp 90 service


CE:


show wccp services detail



daryldano Sat, 07/14/2007 - 05:04
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CS4500#sh ip wccp

Global WCCP information:

Router information:

Router Identifier:

Protocol Version: 2.0


Service Identifier: 70

Number of Cache Engines: 0

Number of routers: 0

Total Packets Redirected: 0

Redirect access-list: -none-

Total Packets Denied Redirect: 0

Total Packets Unassigned: 0

Group access-list: -none-

Total Messages Denied to Group: 0

Total Authentication failures: 0

Total Bypassed Packets Received: 0


Service Identifier: 90

Number of Cache Engines: 0

Number of routers: 0

Total Packets Redirected: 0

Redirect access-list: -none-

Total Packets Denied Redirect: 0

Total Packets Unassigned: 0

Group access-list: -none-

Total Messages Denied to Group: 0

Total Authentication failures: 0

Total Bypassed Packets Received: 0


CS4500#sh ip wccp 90 detail

WCCP Cache-Engine information:

Web Cache ID:

Protocol Version: 2.0

State: NOT Usable

Redirection: L2

Packet Return: L2

Packets Redirected: 0

Connect Time: 1w5d

Assignment: MASK


CS4500#sh ip wccp 90 service

WCCP service information definition:

Type: Dynamic

Id: 90

Priority: 220

Protocol: 6

Options: 0x00000512

--------

Mask/Value sets: 0

Value elements : 0

Ports: Destination:: aa bbb cccc dddd eeee ffff gggg hhhh



===Cache Engine===

Service Details for WCCPv2 Service 90 Service

Service Enabled : Yes

Service Priority : 220

Service Protocol : 6

Application : HTTPS cache

Service Flags (in Hex) : 512

Service Ports : aa bbb cccc dddd

: eeee 0 0 0

Security Enabled for Service : No

Multicast Enabled for Service : No

Weight for this Web-CE : 0

Negotiated forwarding method : GRE

Negotiated assignment method : HASH

Negotiated return method : GRE

Received Values:

Source IP mask (in Hex) : 0

Destination IP mask (in Hex) : 0

Source Port mask (in Hex) : 0

Destination Port mask (in Hex) : 0

Calculated Values:

Source IP mask (in Hex) : 0

Destination IP mask (in Hex) : 1741

Source Port mask (in Hex) : 0

Destination Port mask (in Hex) : 0





Zach Seils Tue, 07/17/2007 - 22:47
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The settings displayed on your CE do not match the 4500:


Negotiated forwarding method : GRE

Negotiated assignment method : HASH

Negotiated return method : GRE


The 4500 requires L2 Forwarding and Mask Assignment.


Zach



daryldano Tue, 07/17/2007 - 23:25
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Ok thanks, I will try that.


I also have another concern,


Would it be possible to connect the cache engine to 2 core switches for redundancy purposes (just in case im going to do some hardware maintenance on one of the cores, i dont want my clients connection to the cache engine to be distrupted)? Are there going to be caching or routing issues if I would implement it? Could you give me an idea how to configure it?


Thanks,


-Daryl



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