[cisco-bba] LNS with 7200 with NPE-G1
werber at cisco.com
Wed Oct 26 12:15:05 EDT 2005
Ignored MPF Features
Ignored features in an MPF network are those Cisco IOS features that are
neither accelerated by MPF nor punted for Cisco IOS processing. When an
ignored MPF feature is applied to a native GE interface on an MPF
system, the system accepts the configuration. However the unsupported
MPF feature is ignored for traffic going through that native GE interface.
An ignored MPF feature is not punted and not processed by Cisco IOS
software. The feature is ignored and does not cause any unexpected Cisco
IOS drops, crashes, network instability, or major behavioral differences.
Ignored Warning Message
When an ignored MPF feature is configured, the system issues a console
warning message for main physical interfaces and virtual templates. To
avoid console loading issues, a single warning message is issued only
for the first occurrence of the specific ignored feature for
subinterfaces (VLANs) and virtual accesses (sessions).
Since the description says, the features will not be punted to the IOS
CPU, they will not be used at all (punt would be the slow path, which is
used for some other features that cannot be done in MPF).
Tassos Chatzithomaoglou wrote:
> We got the following error:
> %MPF-4-IGNOREDFEATURES: Interface Gi0/1: Input "NetFlow" configurations are not MPF supported and
> are IGNORED.
> Does this mean netflow won't be enabled at all or netflow will be enabled but won't get any benefit
> from MPF?
> Richard Licon (rlicon) wrote on 19/10/2005 12:37:
>>Please see inline @ #RL ...
>>From: Kristofer Sigurdsson [mailto:kristo at ipf.is]
>>Sent: Wednesday, October 19, 2005 2:10 AM
>>To: Richard Licon (rlicon)
>>Cc: Dennis Peng (dpeng); Christian Schmit; cisco-bba at puck.nether.net
>>Subject: RE: [cisco-bba] LNS with 7200 with NPE-G1
>>On Tue, 2005-10-18 at 14:43 -0700, Richard Licon (rlicon) wrote:
>>>As Dennis mentions, MPF might be a good fit here for this config,
>>>especially since the interfaces appear to be only ethernet.
>>>More can be found here:
>>A pretty informational document. However, a few questions:
>>1. A ROMmon upgrade. How big a deal? Can one download the image somewhere on CCO? I seem to be unable to find it.
>>#RL - A big deal if not done properly, but it's pretty straight forward procedure. One needs to purchase the MPF license.
>>2. Price of the software. Last time I checked it was around USD $10,000?
>>#RL - Yes.
>>3. Stability. Quoting the document, "The MPF image should not be used as a general purpose router image.". What does this mean? Is it not reliable enough?
>>#RL - MPF should be used for "specific" configurations or applications. If a customer sees a fit for the accelerated features, then MPF makes sense. Customers can take advantage of the MPF software for high speed internet access with MPF providing the accelerated performance via CPU1 i.e, L2TP traffic with ACLs/uRPF/Policing configured and add value-added services to be switched by CPU0; i.e, per-user Firewall with CBAC.
>>"General purpose router image" meaning MPF software is not a swiss army knife type image.
>>4. Restrictions. According to the document, MPF does not support MPLS. Does this mean if I'm using MPLS, I will get no acceleration, or just "less acceleration" (will other features still be accelerated?).
>>#RL - Today, MPLS is not supported in the MPF images (-is- and -i12o3s), however VRF-lite is accelerated.
>>What I'm looking for is really an acceleration on the data plane for customer's traffic.
>>Is Cisco recommending the use of MPF in a live service provider network right now?
>>#RL - We have customers using MPF in their production network.
Waltraud Erber <werber at cisco.com> - Network Consulting Engineer
Cisco Systems Am Soeldnermoos 17, 85399 Hallbergmoos, Germany
Phone: +49 811 559 5301 Mobile: +49 171 861 4922
More information about the cisco-bba