10.2 Routing Policy Features Supported by the S6700
When configuring routing policies, you can use these filters: ACL, IP prefix list, AS-Path filter,
community filter, extended community filter, RD filter, and Route-Policy.
Filters
The S6700 provides several types of filters for routing protocols, such as Access Control Lists
(ACLs), IP prefix lists, AS-Path filters, community filters, extended community filters
(Extcommunity-filters), and Route-Policies.
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ACL
The ACL consists of the ACL for IPv4 packets and the ACL for IPv6 packets. According
to the usage, ACLs are classified into three types, that is, layer 2 ACLs, basic ACLs, and
advanced ACLs. When defining an ACL, you can specify the IP address and subnet range
to match the destination network segment address or the next hop address of a route.
For details of the ACL configuration, refer to the S6700 Series Ethernet Switches
Configuration Guide - IP Services
.
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IP-Prefix List
The IP-prefix list consists of IPv4 prefix list and IPv6 prefix list. The implementation of
the IP-prefix is flexible.
An IP-prefix list is identified by its list name. Each prefix list includes multiple entries.
Each entry can independently specify the matching range in the form of the network prefix.
The matching range is identified by an index number that designates the sequence of the
matching check.
During the matching, the switch checks entries identified by index numbers in an ascending
order. When a route matches an entry, the system does not search the next entry matching
the route. For the detailed configuration, refer to
Configuring the IP-Prefix List
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AS-Path Filter
Border Gateway Protocol (BGP) routing information packet includes an autonomous
system (AS) path domain. The AS-Path filter specifies the matching condition for the AS
path domain.
For the configuration of AS-Path filter, refer to
.
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Community Filter
The community filter is used only in BGP. The BGP routing information includes a
community attribute domain. It is used to identify a community. The community filter
specifies the matching condition for the community attribute domain.
For the configuration of community filter, refer to
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Extcommunity-Filter
The Extcommunity-filter is used only in BGP. The extended community of BGP supports
only the Router-Target (RT) extended community of Virtual Private Network (VPN). The
Extcommunity-filter specifies matching rules for the extended community attribute.
For the configuration of excommunity-filter, refer to
.
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RD Filter
Through Route Distinguisher (RD), the VPN instance implements the independency of
address space and identifies the IPv4 and IPv6 prefixes of the same address space. The RD
attribute filter specifies matching conditions for different RDs.
S6700 Series Ethernet Switches
Configuration Guide - IP Routing
10 Routing Policy Configuration
Issue 01 (2012-03-15)
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