Re: [OSL | CCIE_RS] Compressed TCP

[Scott Morris]

There were a lot of changes to interface-based processing over time.  MQC has added a lot of features and changed some of the order of operations.  Priority queuing came in long before that.  So we may simply see an evolution where newer routers/IOS versions are phasing that out.   Anything you have in the real lab today goes through a review process.  Even when they bring old labs back and revise them, there's still a review process to weed out things like that which no longer exist.   HTH,   Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE #153, CISSP, et al. CCSI/JNCI-M/JNCI-J IPExpert VP - Curriculum Development IPExpert Sr. Technical Instructor [EMAIL PROTECTED] http://www.ipexpert.com     From: Jayagiri B Nair [mailto:[EMAIL PROTECTED] Sent: Wednesday, July 05, 2006 4:33 AM To: [EMAIL PROTECTED]; ccie_rs@onlinestudylist.com Subject: RE: [OSL | CCIE_RS] Compressed TCP Hi Scott   Thanks for your reply. Sorry for made the confusion. Actually the doubt came from WB 8.0, section 19, QOS topic.In the priority queuing the question asks as follows:   Queue 1 Level: High       Protocol: CompressedTCP          Number of packets: 25   And I could not see compressedTCP as an option in my IOS. Anyway I have checked the answer and it says,  priority-list 1 protocol compressedtcp low.   Hope I can see this option in the lab IOS as I am using an old IOS.     Thanks for your other explanations, given me more ideas on that.   Rgds Jay From: Scott Morris [mailto:[EMAIL PROTECTED]] Sent: Tuesday, July 04, 2006 9:52 PM To: Jayagiri B Nair; ccie_rs@onlinestudylist.com Subject: RE: [OSL | CCIE_RS] Compressed TCP   I'm not sure I understand the question.  The compression will occur prior to a packet getting into the queuing mechanisms.  So it would really not appear as anything in particular (other than an IP packet) AFAIK.  Most importantly, it wouldn't appear as anything really reachable.   According to Cisco docs, queuing isn't supported (use FIFO) when you are employing compression mechanisms at the interface level.    But (as always) there is an exception/workaround for that.  MQC supports header compression in the queue-level.  So in your policy map, you can state "compress header ip tcp" after you have successfully matched what things you are or are not going to compress.  otherwise, you will be stuck with some method of classifying/marking at a previous interface and just passing things through.   HTH,   Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE #153, CISSP, et al. CCSI/JNCI-M/JNCI-J IPExpert CCIE Program Manager IPExpert Sr. Technical Instructor [EMAIL PROTECTED] http://www.ipexpert.com       From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jayagiri B Nair Sent: Tuesday, July 04, 2006 11:34 AM To: ccie_rs@onlinestudylist.com Subject: [OSL | CCIE_RS] Compressed TCP Hi guys   How we will say compressed TCP as a flow in a priority queue? If through port, which port is it?   Thanks   Jay    Jayagiri Nair Network Administrator, P O Box: 502211, Dubai, UAE. Tel:     +971-4-3677114 Fax:    + 971-4-3677414 Mobile:+971-50-6563385 email: jayagiri.nair@showtimearabia.com   Note: This e-mail (including any attachments) is intended only for the recipient(s) named above. It may contain confidential or privileged information and any use, dissemination, distribution, or reproduction of this message by unintended recipients is not authorized and may be unlawful. If you are not a named recipient, please inform the sender and delete the e-mail from your system. The contents of this communication do not necessarily represent the view of Gulf DTH LDC, Gulf DTH Production, Global Direct Electronic Preparation Company Limited, Global Direct for Satellite Service LLC, Global Direct Egypt Ltd, Digital Satellite LLC, or any of their affiliated companies (together "Showtime"). Showtime hereby reserves the right to monitor e-mail communication from external/internal sources for the purposes of ensuring correct and appropriate use of Gulf DTH communication equipment in accordance with Showtime internal IT policy.