not too sure how L2 redirect works. however with GRE redirection, this is a typical problem, and is generally a cache bug, where the cache's implementation of wccp doesnt support reverse bypass.
When the cache bypasses requests, it should return them to the router gre encapsulated, so that router doesnt redirect them back to the cache. in case the cache does not forward bypass requests as gre encapsulated, the router will direct such requests back to the cache again, forming an infinte loop, which saturates the box, possibly freezing or crashing it. however this may not be the case with L2 redirection, since it doesnt use GRE, but may be related. hope this helps cheers Mark > -----Original Message----- > From: Daou Iddir [mailto:[EMAIL PROTECTED]] > Sent: 04 December 2002 10:23 > To: [EMAIL PROTECTED] > Subject: [isp-caching] RE : isp-caching digest: December 03, 2002 > > > Hi Erick, > > You're right about IOS versions available for Cat 3550. My switch runs > an EMI image. > Since my message has been posted, I have been able to set up WCCP v2 > working with my 3550 switch. For that, CacheFlow sent me a CacheOS > pre-release version 4.2 that supports L2 so Cat 3550 supports only this. > > I'm now working on another problem regarding CacheFlow. > > Our problem is that CA-6026 runs well during less than 15 minutes and > then gets blocked. As a result we should restart it or re-configure WCCP > redirection on the catalyst in order to re-initialize caching process. > > By analysing CF statistics, we have noticed that the number of HTTP/FTP > clients was normally around 200 and then suddenly, we don't know why, > this number reaches a pick at 2000 HTTP/FTP clients. As a result, the > CacheFlow gets completely blocked as our Internet traffic. The only way > we found to restart our Internet connexion was to restart the CacheFlow > or to remove the cache from the network. > We also can launch "no ip wccp web-cache redirect in" IOS command on > Catalyst VLAN interface connecting the user LAN and then apply again the > WCCP redirection in order to restart caching process. > > This problem occurs with transparent caching or WCCPv2. We have decided > to try to configure our CacheFlow for running WCCPv2 as suggested by > CacheFlow support and by our resellers in order to remove this bug. > I am testing this since monday night (only HTTP caching). The result is > not better. The CacheFlow hangs with the same initial reason > approximately every 15 minutes. > > Thanks for your help. > > Regards, > Daou. > > -- > Daou Iddir > Simmedia Stream > > > -----Message d'origine----- > De : ISP-CACHING Discussion List digest > [mailto:[EMAIL PROTECTED]] > Envoyé : mercredi 4 décembre 2002 09:00 > À : isp-caching digest recipients > Objet : isp-caching digest: December 03, 2002 > > ISP-CACHING Digest for Tuesday, December 03, 2002. > > 1. WCCP issue on Catalyst 3550 with CacheFlow 6000 > 2. Re: WCCP issue on Catalyst 3550 with CacheFlow 6000 > 3. Re: WCCP issue on Catalyst 3550 with CacheFlow 6000 > > ---------------------------------------------------------------------- > > Subject: WCCP issue on Catalyst 3550 with CacheFlow 6000 > From: "Daou Iddir" <[EMAIL PROTECTED]> > Date: Sat, 30 Nov 2002 11:07:15 +0100 > X-Message-Number: 1 > > Hi everybody, > > I want to configure WCCP v2 on a Catalyst 3550 running IOS 12.1(11)EA1a. > Originally my Catalyst was supplied with IOS 12.1(8)EA1c but I was > enable to activate any WCCP config on it. I upgraded then to IOS > 12.1(11)EA1a. I configure WCCP "redirect in" on the customer VLAN side. > The catalyst see my caching engine (CacheFlow 6000) but no packets are > redirected to it. I don't want to use Layer 2 redirection, so CacheFlow > does not support it. > > I have a case opened with CacheFlow and another one opened with Cisco. > CacheFlow support engineers are asking me to test an IOS version 12.1.3. > Cisco support engineers suggest me to don't change my IOS version and > are still working on my case. > > Does somebody can suggest me some action to take from experience? > > Thanks in advance, > Daou. > > -- > Daou Iddir > Simmedia Stream > > > > > ---------------------------------------------------------------------- > > Subject: Re: WCCP issue on Catalyst 3550 with CacheFlow 6000 > From: "Erick B." <[EMAIL PROTECTED]> > Date: Tue, 3 Dec 2002 21:58:26 -0800 (PST) > X-Message-Number: 2 > > Well, first of all there is no 12.1.3 for 3550 that I > can see. Is this a EMI or SMI image your running? You > are running the most recent version released according > to CCO. > > I happen to have a few 3550s and some CacheFlows I can > try to get working w/WCCP. Probably not exact model CF > you have. Let me know the software version on the > cacheflow. I'll see if I can find a few spare moments > to set this up. You doing anything fancy with WCCP or > just plain old wccp redirection and transparent > caching on CF? > > When you say layer 2 redirection - what do you mean > exactly? I'm aware you can do redirection with a > route-map but that would be L3. > > Erick > > --- Daou Iddir <[EMAIL PROTECTED]> wrote: > > Hi everybody, > > > > I want to configure WCCP v2 on a Catalyst 3550 > > running IOS 12.1(11)EA1a. > > Originally my Catalyst was supplied with IOS > > 12.1(8)EA1c but I was > > enable to activate any WCCP config on it. I upgraded > > then to IOS > > 12.1(11)EA1a. I configure WCCP "redirect in" on the > > customer VLAN side. > > The catalyst see my caching engine (CacheFlow 6000) > > but no packets are > > redirected to it. I don't want to use Layer 2 > > redirection, so CacheFlow > > does not support it. > > > > I have a case opened with CacheFlow and another one > > opened with Cisco. > > CacheFlow support engineers are asking me to test an > > IOS version 12.1.3. > > Cisco support engineers suggest me to don't change > > my IOS version and > > are still working on my case. > > > > Does somebody can suggest me some action to take > > from experience? > > > > Thanks in advance, > > Daou. > > > > -- > > Daou Iddir > > Simmedia Stream > > > __________________________________________________ > Do you Yahoo!? > Yahoo! Mail Plus - Powerful. Affordable. Sign up now. > http://mailplus.yahoo.com > > ---------------------------------------------------------------------- > > Subject: Re: WCCP issue on Catalyst 3550 with CacheFlow 6000 > From: "Erick B." <[EMAIL PROTECTED]> > Date: Tue, 3 Dec 2002 21:58:26 -0800 (PST) > X-Message-Number: 3 > > Well, first of all there is no 12.1.3 for 3550 that I > can see. Is this a EMI or SMI image your running? You > are running the most recent version released according > to CCO. > > I happen to have a few 3550s and some CacheFlows I can > try to get working w/WCCP. Probably not exact model CF > you have. Let me know the software version on the > cacheflow. I'll see if I can find a few spare moments > to set this up. You doing anything fancy with WCCP or > just plain old wccp redirection and transparent > caching on CF? > > When you say layer 2 redirection - what do you mean > exactly? I'm aware you can do redirection with a > route-map but that would be L3. > > Erick > > --- Daou Iddir <[EMAIL PROTECTED]> wrote: > > Hi everybody, > > > > I want to configure WCCP v2 on a Catalyst 3550 > > running IOS 12.1(11)EA1a. > > Originally my Catalyst was supplied with IOS > > 12.1(8)EA1c but I was > > enable to activate any WCCP config on it. I upgraded > > then to IOS > > 12.1(11)EA1a. I configure WCCP "redirect in" on the > > customer VLAN side. > > The catalyst see my caching engine (CacheFlow 6000) > > but no packets are > > redirected to it. I don't want to use Layer 2 > > redirection, so CacheFlow > > does not support it. > > > > I have a case opened with CacheFlow and another one > > opened with Cisco. > > CacheFlow support engineers are asking me to test an > > IOS version 12.1.3. > > Cisco support engineers suggest me to don't change > > my IOS version and > > are still working on my case. > > > > Does somebody can suggest me some action to take > > from experience? > > > > Thanks in advance, > > Daou. > > > > -- > > Daou Iddir > > Simmedia Stream > > > __________________________________________________ > Do you Yahoo!? > Yahoo! Mail Plus - Powerful. Affordable. Sign up now. > http://mailplus.yahoo.com > > > > --- > > END OF DIGEST > > --- > You are currently subscribed to isp-caching as: [EMAIL PROTECTED] > To unsubscribe send a blank email to > %%email.unsub%% > > > > > ____________ The ISP-CACHING Discussion List ___________ > To Join: mailto:[EMAIL PROTECTED] > To Remove: mailto:[EMAIL PROTECTED] > Archives: http://isp-lists.isp-planet.com/isp-caching/archives/ > ____________ The ISP-CACHING Discussion List ___________ To Join: mailto:[EMAIL PROTECTED] To Remove: mailto:[EMAIL PROTECTED] Archives: http://isp-lists.isp-planet.com/isp-caching/archives/
