Re: CEF/dCEF [7:7330]
packet per packet load balancing is possible using regular cef Brian From: West, Karl Reply-To: West, Karl To: [EMAIL PROTECTED] Subject: CEF/dCEF [7:7330] Date: Wed, 6 Jun 2001 09:38:53 -0400 To all: I understand the features that CEF/dCEF provide for high end VIP based routers. I know the 3600's and 2100's has CEF options in their IOS, what would running CEF on these platforms benefit me? Karl _ Get your FREE download of MSN Explorer at http://explorer.msn.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=8266t=7330 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CEF/dCEF [7:7330]
For those of you following this: I tried turning route caching off on the T1s and just using the ip cef and load-balancing per-packet commands, but that didn't work. My CPU started climbing back into the 30% range and when I did a show run the router had automatically added no ip route-cache cef and no ip route-cache as if they were two separate things. I wasn't able to get it to fast-switch without the route-cache command and I couldn't get it to take ip route-cache cef without also removing the regular no ip route-cache command. I never did get true packet-by-packet load balancing across the 3 T1s. It seemed like turning off route-caching turned off CEF for that interface and it went back to process switching. But, with it turned on the load was spread across the 3 T1s, but not equally. I'll probably have to ask our Cisco SE why the 'load-balance per-packet' doesn't seem to be working like we would expect it to. -Original Message- From: Mike Fountain [mailto:[EMAIL PROTECTED]] Sent: Wednesday, June 06, 2001 4:17 PM To: [EMAIL PROTECTED] Subject: Re: CEF/dCEF [7:7330] No, it isn't exactly packet by packet. Supposedly you can get packet by packet, but I haven't yet. After turning CEF we configured the interfaces for ip route-cache cef and ip load-balancing packet-per-packet There are 3 T1s on that guy, and last time a looked the loads were 2/255, 5/255, and 8/255. I'm thinking maybe if we used the load balancing command with no ip route-cache instead of the route-cache cef command it might be a little more even. This is a new turn-up so we're still playing. I might try turning off caching but leave CEF on and see what happens. - Original Message - From: Chuck Larrieu To: Sent: Wednesday, June 06, 2001 11:24 AM Subject: RE: CEF/dCEF [7:7330] Idle curiousity - are you getting true packet by packet load sharing? Or conversation by conversation? i.e. is your traffic balance 50-50 ( for two lines )? Or some other figure, because traffic for particular destinations is dent out particular links due to the route caching? Chuck -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Mike Fountain Sent: Wednesday, June 06, 2001 8:05 AM To: [EMAIL PROTECTED] Subject: Re: CEF/dCEF [7:7330] We use CEF on some of our 2600s so that we can do Packet-by-Packet loadbalancing without having to process-switch every packet and burn up the CPU - Original Message - From: West, Karl To: Sent: Wednesday, June 06, 2001 9:38 AM Subject: CEF/dCEF [7:7330] To all: I understand the features that CEF/dCEF provide for high end VIP based routers. I know the 3600's and 2100's has CEF options in their IOS, what would running CEF on these platforms benefit me? Karl Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=7522t=7330 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
CEF/dCEF [7:7330]
To all: I understand the features that CEF/dCEF provide for high end VIP based routers. I know the 3600's and 2100's has CEF options in their IOS, what would running CEF on these platforms benefit me? Karl Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=7330t=7330 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CEF/dCEF [7:7330]
We use CEF on some of our 2600s so that we can do Packet-by-Packet loadbalancing without having to process-switch every packet and burn up the CPU - Original Message - From: West, Karl To: Sent: Wednesday, June 06, 2001 9:38 AM Subject: CEF/dCEF [7:7330] To all: I understand the features that CEF/dCEF provide for high end VIP based routers. I know the 3600's and 2100's has CEF options in their IOS, what would running CEF on these platforms benefit me? Karl Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=7343t=7330 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: CEF/dCEF [7:7330]
Idle curiousity - are you getting true packet by packet load sharing? Or conversation by conversation? i.e. is your traffic balance 50-50 ( for two lines )? Or some other figure, because traffic for particular destinations is dent out particular links due to the route caching? Chuck -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Mike Fountain Sent: Wednesday, June 06, 2001 8:05 AM To: [EMAIL PROTECTED] Subject:Re: CEF/dCEF [7:7330] We use CEF on some of our 2600s so that we can do Packet-by-Packet loadbalancing without having to process-switch every packet and burn up the CPU - Original Message - From: West, Karl To: Sent: Wednesday, June 06, 2001 9:38 AM Subject: CEF/dCEF [7:7330] To all: I understand the features that CEF/dCEF provide for high end VIP based routers. I know the 3600's and 2100's has CEF options in their IOS, what would running CEF on these platforms benefit me? Karl Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=7350t=7330 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: CEF/dCEF [7:7330]
hmmm I have tried it with and with-out and I have not seen any performance difference. Have you? -Original Message- From: Mike Fountain [mailto:[EMAIL PROTECTED]] Sent: Wednesday, June 06, 2001 10:48 AM To: West, Karl; [EMAIL PROTECTED] Subject: Re: CEF/dCEF [7:7330] We use CEF on some of our 2600s so that we can do Packet-by-Packet loadbalancing without having to process-switch every packet and burn up the CPU - Original Message - From: West, Karl To: Sent: Wednesday, June 06, 2001 9:38 AM Subject: CEF/dCEF [7:7330] To all: I understand the features that CEF/dCEF provide for high end VIP based routers. I know the 3600's and 2100's has CEF options in their IOS, what would running CEF on these platforms benefit me? Karl Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=7353t=7330 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: CEF/dCEF [7:7330]
No for packet by packet you get 50-50 do a traceroute out several times and you will see the switch. My question is does it really make a difference on low end routers to have CEF enabled. I have done it both with and without cef with no difference. -Original Message- From: Chuck Larrieu [mailto:[EMAIL PROTECTED]] Sent: Wednesday, June 06, 2001 11:24 AM To: [EMAIL PROTECTED] Subject: RE: CEF/dCEF [7:7330] Idle curiousity - are you getting true packet by packet load sharing? Or conversation by conversation? i.e. is your traffic balance 50-50 ( for two lines )? Or some other figure, because traffic for particular destinations is dent out particular links due to the route caching? Chuck -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Mike Fountain Sent: Wednesday, June 06, 2001 8:05 AM To: [EMAIL PROTECTED] Subject:Re: CEF/dCEF [7:7330] We use CEF on some of our 2600s so that we can do Packet-by-Packet loadbalancing without having to process-switch every packet and burn up the CPU - Original Message - From: West, Karl To: Sent: Wednesday, June 06, 2001 9:38 AM Subject: CEF/dCEF [7:7330] To all: I understand the features that CEF/dCEF provide for high end VIP based routers. I know the 3600's and 2100's has CEF options in their IOS, what would running CEF on these platforms benefit me? Karl Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=7359t=7330 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: CEF/dCEF [7:7330]
I'm currently using ip cef on my 4000m with two T1s attached. And I'm getting true 50/50 outbound load balancing. My router is ip cef enabled with ip load-sharing per packet. And of course 'ip route-cache' is disabled on the interfaces as well. -Frank On Wed, 6 Jun 2001, Chuck Larrieu wrote: Idle curiousity - are you getting true packet by packet load sharing? Or conversation by conversation? i.e. is your traffic balance 50-50 ( for two lines )? Or some other figure, because traffic for particular destinations is dent out particular links due to the route caching? Chuck -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Mike Fountain Sent: Wednesday, June 06, 2001 8:05 AM To: [EMAIL PROTECTED] Subject: Re: CEF/dCEF [7:7330] We use CEF on some of our 2600s so that we can do Packet-by-Packet loadbalancing without having to process-switch every packet and burn up the CPU - Original Message - From: West, Karl To: Sent: Wednesday, June 06, 2001 9:38 AM Subject: CEF/dCEF [7:7330] To all: I understand the features that CEF/dCEF provide for high end VIP based routers. I know the 3600's and 2100's has CEF options in their IOS, what would running CEF on these platforms benefit me? Karl Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=7361t=7330 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CEF/dCEF [7:7330]
No, it isn't exactly packet by packet. Supposedly you can get packet by packet, but I haven't yet. After turning CEF we configured the interfaces for ip route-cache cef and ip load-balancing packet-per-packet There are 3 T1s on that guy, and last time a looked the loads were 2/255, 5/255, and 8/255. I'm thinking maybe if we used the load balancing command with no ip route-cache instead of the route-cache cef command it might be a little more even. This is a new turn-up so we're still playing. I might try turning off caching but leave CEF on and see what happens. - Original Message - From: Chuck Larrieu To: Sent: Wednesday, June 06, 2001 11:24 AM Subject: RE: CEF/dCEF [7:7330] Idle curiousity - are you getting true packet by packet load sharing? Or conversation by conversation? i.e. is your traffic balance 50-50 ( for two lines )? Or some other figure, because traffic for particular destinations is dent out particular links due to the route caching? Chuck -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Mike Fountain Sent: Wednesday, June 06, 2001 8:05 AM To: [EMAIL PROTECTED] Subject: Re: CEF/dCEF [7:7330] We use CEF on some of our 2600s so that we can do Packet-by-Packet loadbalancing without having to process-switch every packet and burn up the CPU - Original Message - From: West, Karl To: Sent: Wednesday, June 06, 2001 9:38 AM Subject: CEF/dCEF [7:7330] To all: I understand the features that CEF/dCEF provide for high end VIP based routers. I know the 3600's and 2100's has CEF options in their IOS, what would running CEF on these platforms benefit me? Karl Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=7425t=7330 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CEF/dCEF [7:7330]
The load balancing packet-by-packet is just that, but it is NOT bit by bit... But is usually works out great... I turn CEF on in my configs by default, just cause it makes me feel better... -Nate West, Karl wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... To all: I understand the features that CEF/dCEF provide for high end VIP based routers. I know the 3600's and 2100's has CEF options in their IOS, what would running CEF on these platforms benefit me? Karl Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=7476t=7330 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
