Slightly OT: PfARGHHHHHHHH!

So what is this half baked product my SE sold me? The documentation looks
good on Cisco's site and reads

To enforce an entrance link selection, PfR offers the following methods:
BGP Autonomous System Number Prepend

After PfR selects a best entrance for an inside prefix, extra autonomous
system hops (up to a maximum of six) are prepended to the inside prefix BGP
advertisement over the other entrances. The extra autonomous system hops on
the other entrances increase the probability that the best entrance will be
used for the inside prefix. This is the default method PfR uses to control
an inside prefix, and no user configuration is required.
BGP Autonomous System Number Community Prepend

After PfR selects a best entrance for an inside prefix, a BGP prepend
community is attached to the inside prefix BGP advertisement from the
network to another autonomous system such as an ISP. The BGP prepend
community will increase the number of autonomous system hops in the
advertisement of the inside prefix from the ISP to its peers. Autonomous
system prepend BGP community is the preferred method to be used for PfR BGP
inbound optimization because there is no risk of the local ISP filtering
the extra autonomous system hops. There are some issues, for example, not
all ISPs support the BGP prepend community, ISP policies may ignore or
modify the autonomous system hops, and a transit ISP may filter the
autonomous system path. If you use this method of inbound optimization and
a change is made to an autonomous system, you must issue an outbound
reconfiguration using the clear ip bgp command.

http://www.cisco.com/en/US/docs/ios-xml/ios/pfr/configuration/15-1mt/pfr-bgp-inbound.html#GUID-52E6BAC0-FE00-43DD-BE37-822FC2ED5C0F

This sounds great until I read further and find no configuration references
to make this happen. Looking through all commands in

http://www.cisco.com/en/US/docs/ios-xml/ios/pfr/command/pfr-cr-book.html

I don't see anything either.

Is this blatant false advertising or am I missing something?

Regards,

Marc

Blogs and organic groups at http://www.ccie.net
Received on Mon Aug 20 2012 - 16:45:38 ART