Avaya Media Gateway G250, Руководство администратора

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Configuring policy-based routing
670 Administration for the Avaya G250 and Avaya G350 Media Gateways
PBR rules
Each PBR list can have up to 1,500 rules. The first rule that matches the packet specifies the
next hop list for the packet. If no rule matches the packet, the packet is routed according to the
default rule.
You can configure policy rules to match packets based on one or more of the following criteria:
●
Source IP address, or a range of addresses
●
Destination IP address or a range of addresses
●
IP protocol, such as TCP, UDP, ICMP, IGMP
●
Source TCP or UDP port or a range of ports
●
Destination TCP or UDP port or a range of ports
●
ICMP type and code
●
Fragments
●
DSCP
field
Note:
Note:
The fragment criteria is used for non-initial fragments only. You cannot specify
TCP/UDP ports or ICMP code/type for a rule when using the
fragment
command.
Use IP wildcards to specify a range of source or destination IP addresses. The zero bits in the
wildcard correspond to bits in the IP address that remain fixed. The one bits in the wildcard
correspond to bits in the IP address that can vary. Note that this is the opposite of how bits are
used in a subnet mask.
Note:
Note:
When you use destination and source ports in a PBR rule, policy-based routing
does not catch fragments.
Note:
Note:
It is recommended to leave a gap between rule numbers, in order to leave room
for inserting additional rules at a later time. For example, ip-rule 10, ip-rule 20,
ip-rule 30.