RE: CEF on 6500 and ACLs [7:63175]
Do you have a good link. I would like to know more. Thanks. Why such a change from the PFC1/MSFC1. The concept you describe below seems to be a big change. I knew there were intergrating but I could still define the seperation between router and switch with the PFC1/MSFC1. GOTTA BE ON YOUR Ps and Qs or you get left behind. Thats why I love this job! -Original Message- From: Bob Sinclair [mailto:[EMAIL PROTECTED]] Sent: Tuesday, February 18, 2003 9:17 AM To: Newell Ryan D SrA 18 CS/SCBT; [EMAIL PROTECTED] Subject: Re: CEF on 6500 and ACLs [7:63175] Some comments in-line. It is becoming (has become?) very difficult if not impossible to tease out the "switch" from the "router" with PFC2/MSFC2. This box has the functions of both, and they are integrated in the hardware. For example, the Layer 2 switching engine, the Qos engine and the ACL engine are combined in the Lyra ASIC. > With CEF (PFC 2) if there is an adjacency for the destination host, to my > understanding, that packet will never be routed. It should just be rewritten > by the PFC 2 (SP). If this correct then these are my questions. The packet is still "routed", it just is never seen by the piece of hardware we call the MSFC > > 1. How does an IOS ACL affect the rewrite on the switch? > 2. Where on the switch (SP) can I see that it knows an IOS ACL is > there? On that part of the box (which is both switch and router) that we can view through the "IOS window" > 3. Is changing the flow mask on PFC 2(SP) just for Netflow stats. YES, exactly. > Applying an IOS ACL had no effect on the flow mask. YES, exactly > 4. Do MLS commands have on MSFC change anything? I believe the MSFC2 can act as an RP for a Cat 5000 doing MLS. I believe the MLS commands there are for that purpose. > > Thanks! Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=63193&t=63175 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CEF on 6500 and ACLs [7:63175]
Some comments in-line. It is becoming (has become?) very difficult if not impossible to tease out the "switch" from the "router" with PFC2/MSFC2. This box has the functions of both, and they are integrated in the hardware. For example, the Layer 2 switching engine, the Qos engine and the ACL engine are combined in the Lyra ASIC. > With CEF (PFC 2) if there is an adjacency for the destination host, to my > understanding, that packet will never be routed. It should just be rewritten > by the PFC 2 (SP). If this correct then these are my questions. The packet is still "routed", it just is never seen by the piece of hardware we call the MSFC > > 1. How does an IOS ACL affect the rewrite on the switch? > 2. Where on the switch (SP) can I see that it knows an IOS ACL is > there? On that part of the box (which is both switch and router) that we can view through the "IOS window" > 3. Is changing the flow mask on PFC 2(SP) just for Netflow stats. YES, exactly. > Applying an IOS ACL had no effect on the flow mask. YES, exactly > 4. Do MLS commands have on MSFC change anything? I believe the MSFC2 can act as an RP for a Cat 5000 doing MLS. I believe the MLS commands there are for that purpose. > > Thanks! Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=63192&t=63175 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
CEF on 6500 and ACLs [7:63175]
With CEF (PFC 2) if there is an adjacency for the destination host, to my understanding, that packet will never be routed. It should just be rewritten by the PFC 2 (SP). If this correct then these are my questions. 1. How does an IOS ACL affect the rewrite on the switch? 2. Where on the switch (SP) can I see that it knows an IOS ACL is there? 3. Is changing the flow mask on PFC 2(SP) just for Netflow stats. Applying an IOS ACL had no effect on the flow mask. 4. Do MLS commands have on MSFC change anything? Thanks! Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=63175&t=63175 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
