Description of Problem:
The check_default_route() in /etc/sysconfig/network-scripts/network-functions is too slow.

It takes the output of 'ip route' and greps it for default route:

check_default_route ()
{
   LC_ALL=C ip route | grep -q default
}

Instead it should be:

check_default_route ()
{
  LC_ALL=C ip route list match 0/0 | grep -q default
}

By using 'list match' to find a default route, the function runs about 20-50 times faster.

This is important on boxes with many hundreds of thousands of bgp routes.
 
find_gateway_dev () can probably be optimized in similar fashion.

Version-Release number of selected component (if applicable):


How Reproducible:
Every time

Steps to Reproduce:
1. install <a href="http://www.zebra.org">zebra</a>
2. get a bgp feed of several 100,000's routes
3. ctrl-alt-del to shutdown

Actual Results:
very slow shutdown

Expected Results:
should shutdown much faster

Additional Information: