Riverbed SteelHead 3070-SD, User Manual

Page: 80 / 124

80 | Configuring BGP and OSPF Routing Policies on SteelHead SD
Configuring route maps
Policies at the
BGP neighbor
level • Origin type - The path attribute in the BGP
update message that indicates the origin of
the route. For details, see
“Configuring BGP
path selection” on page 45 . Select the origin
type from the list:
– igp - The route is interior gateway protocol
(IGP) (such as OSPF) to the AS of origination.
The routes received from BGP are marked
with the ‘i”.
– egp -Route is received from BGP via Exterior
Gateway Protocol (EGP), as indicated by “e”
in the BGP table.
– incomplete - The routes that are
redistributed into BGP using the
redistribution command. These routes are
marked with “?” in the BGP routing table.
• Community - Optionally, select the
community list. A BGP route is permitted if it
belongs to the specified community string.
For details, see
“Configuring BGP path
selection” on page 45 .
• Next hop list - Optionally, select the next-hop
prefix. When the next-hop address matches
the selected address, the route qualifies for
distribution by the router.
• Metric - Optionally, enter a value from 0 to
4294967295. When a metric value in a route
matches this value, the route qualifies for
distribution by the router.
• Tag - Optionally, enter a value from 0 to
4294967295. When a tag in a route matches
this value, the route qualifies for distribution
by the router.
• Origin type - The path attribute in the
BGP update message that indicates the
origin of the route. For details, see
“Configuring BGP path selection” on
page 45
. Select the origin type from the
list:
– igp - The route is interior gateway
protocol (IGP) (such as OSPF) to the AS
of origination. The routes received
from BGP are marked with the ‘i”.
– egp -Route is received from BGP via
Exterior Gateway Protocol (EGP), as
indicated by “e” in the BGP table.
– incomplete - The routes that are
redistributed into BGP using the
redistribution command. These routes
are marked with “?” in the BGP routing
table.
• AS path - Click On to set the AS path for
the route. Specify the AS string as space
separated list from 1 to 4294967295. For
details, see
“Configuring BGP path
selection” on page 45 .
• Tag - If On , then the value is prepended
with the AS path of the BGP route.
• IP next hop - If On , then updates the IP
next-hop address of the routes. Enter the
IP address to be used as the next hop.
• Self address - If On , under Self address,
click On to use the self address as the
next-hop address.
• Metric - Optionally, enter a value from 0
to 4294967295. When a metric value in a
route matches this value, the route
qualifies for distribution by the router.
• Local-preference - Optionally, enter the
value from 0 to 4294967295 to set the
value to the received routes. The default
value for the local preference is 100. If a
route has no local preference specified it
is treated as if it had a local preference of
100. If the iBGP speaker receives multiple
routes to the same destination, then the
route with the highest value is preferred.
For details, see
“Configuring BGP path
selection” on page 45 .
Use case Match criteria Set criteria