A minor correction

[Ramakrishna Gummadi <ramki@cs.berkeley.edu>]

Sorry for this, but the following line:

> If ISP2 has problems, and links L3 become unusable, R1 tries to setup a

in my previous mail should read:

If ISP2 has problems, and links *L2 and* L3 become unusable, R1 tries to
setup a (etc.)

-ramki