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DES-7200 Configuration Guide Chapter 7 Policy-based Routing
Configuration
7-3
works immediately.
When R1 of the active next hop fails, the system automatically hands over to R2
of the next next hop. When R1 recovers, the system will automatically hand over
back to R1.
When there are many next hops in the order, for instance, R1/R2/R3, R2 takes
effect after you deleting and then adding R1 in the order of R2/R3/R1.
Load balancing: Load balancing is enabled among next hops by traffic. This
function is not available for the next hop in egress type.
Caution
1 Only one route map can be configured on a port. Configuring route maps
repeatedly on a port will overlap the previous configurations, namely that latest
configuration takes effect.
2 Only one IPv6 ACL can be configured in the sub route map.
3 If the sub route map is configured with next hop but not ACL, all packets are
matched; if the sub route map is configured with ACL but not next hop, the
matched packets are forwarding by common routes; if the sub route map is not
configured with ACL and next hop, all packets are forwarded by common
routes.
4 If the policy-based routing is configured with an inexistent ACL, all packets
are matched; if the policy-based routing is configured with an ACL without any
ACE, the system will not match the packets starting from the ACL of the next
sub route map. If the policy-based routing is configured with an inexistent ACL,
all packets are matched; if the policy-based routing is configured with an ACL
without any ACE, the system skips this sequence and matches packets starting
from the ACL of next sub route map. It is not recommended to configure ACL
without ACE.
5 The deny rule of ACE forwards packets by common routes. To meet the
match rule of policy-based routing, the deny any any command matches
packets starting from the next IPv6 ACL.
6 Enabling PBR will apply to incoming packets at the same time. If you do not
need to apply PBR to a specific incoming IPv4/v6 packet, add “deny the specific
IPv4/v6 address” in the ACL by hand.
7 In redundant backup mode, the IP packets matching the policy of the sub
route map are forwarded to the next hop firstly resolved in the sequence. If all
next hops are not resolved, the IP packets matching the policy are dropped. If
the first next hop is resolved later, the IP packets matching the policy are
forwarded to the first next hop.
8 Routers do not support enabling PBR on the DAILER interface. PBR does not
take effect if it is enabled.