R0106-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V7)

357
Clause Meanin
g
Priorit
y
apply continue
Matches packets against
the next node upon
failure on the current
node.
The apply continue clause applies when the
apply access-vpn vpn-instance, apply next-hop,
apply output-interface, apply default-next-hop,
and apply default-output-interface clauses are
not configured or become invalid. For example,
the specified next hop is unreachable, the
specified output interface is down, or the
packets cannot be forwarded in the specified
VPN instance.
Relationship between the match mode and clauses on the node
Does a packet match all
the if-match clauses on
the node?
Match mode
Permit Deny
Yes.
• If the node is configured with apply
clauses, PBR executes the apply
clauses on the node.
{ If the PBR-based forwarding
succeeds, PBR does not match the
packet against the next node.
{ If the PBR-based forwarding fails
and the apply continue clause is
not configured, PBR does not
match the packet against the next
node.
{ If the PBR-based forwarding fails
and the apply continue clause is
configured, PBR matches the
packet against the next node.
• If the node is configured with no
apply clauses, the packet is
forwarded according to the routing
table.
The packet is forwarded according
to the routing table.
No.
PBR matches the packet against the next
node.
PBR matches the packet against the
next node.
A node that has no if-match clauses matches any packet.
PBR and Track
PBR can work with the Track feature to dynamically adapt the availability status of an apply clause to the
link status of a tracked object. The tracked object can be a next hop, output interface, default next hop,
or default output interface:
• When the track entry associated with an object changes to Negative, the apply clause is invalid.
• When the track entry changes to Positive or NotReady, the apply clause is valid.
For more information about Track-PBR collaboration, see High Availability Configuration Guide.