Using A Route Map To Mark Packets With A Qos Value - HP 7102dl - ProCurve Secure Router Configuration Manual

IP Routing—Configuring RIP, OSPF, BGP, and PBR
Configuring Policy-Based Routing
The router would still route this traffic as indicated in the routing table when
the table includes an explicit route for the traffic's destination (for example,
a local network). However, when the table does not contain a route to the
destination, the router would forward the high-priority traffic according to the
default route in the route map entry instead of the default route in the
routing table.
To configure the traffic-specific default route, you should first create the route
map entry and select the traffic. (See "Selecting Traffic for a Route Map Entry"
on page 15-128.) You can then specify the next hop address or the forwarding
interface for the traffic-specific default route:
Syntax: set ip default next-hop <A.B.C.D> [<secondary A.B.C.D>]
Syntax: set default interface <interface ID> [<secondary interface ID>]
If you enter both commands, then the router will first attempt to route traffic
to the default next hop address. If the interface for this neighbor is down, the
router will attempt any secondary next hop addresses. Finally, the router will
transmit the packet through the default interface. It is sometimes a good idea
to only enter a default interface so that the route will remain valid even if
neighbors' IP addressing changes.

Using a Route Map to Mark Packets with a QoS Value

You can also use the route map to mark selected packets with an IP prece-
dence or DiffServ value. This value requests a particular type of service for
the packets in the network to which the router is forwarding them. Having
routers at remote sites mark outbound packets simplifies QoS configuration
for the entire network. You do not have to configure complex QoS policies on
every WAN router at the central site.
To mark selected packets with an IP precedence value, enter this command
from the route map configuration mode context:
Syntax: set ip precedence [critical | flash | flash-override | immediate | internet |
network | priority | routine | <value>]
You can enter either a keyword or a value between 0 and 7. (IP precedence
value 6 is generally reserved for Internet control traffic and 7 for private
network control traffic.)
DiffServ values request a specific PHB. If routers in the remote network
support DiffServ, they should forward a packet according to the PHB defined
for its DiffServ value. It is up to the administrators of that network to define
and implement policies for each supported PHB.
15-141