BGP: Update list of supported standards
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Ondrej Zajicek (work)
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4 changed files with 68 additions and 13 deletions
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@ -1964,16 +1964,39 @@ table it wishes to export along with complete path information (a list of AS'es
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the packet will travel through if it uses the particular route) in order to
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avoid routing loops.
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<p>BIRD supports all requirements of the BGP4 standard as defined in
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<rfc id="4271"> It also supports the community attributes (<rfc id="1997">),
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capability negotiation (<rfc id="5492">), MD5 password authentication
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(<rfc id="2385">), extended communities (<rfc id="4360">), route reflectors
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(<rfc id="4456">), AS confederations (<rfc id="5065">), graceful restart
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(<rfc id="4724">), multiprotocol extensions (<rfc id="4760">), 4B AS numbers
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(<rfc id="4893">), and 4B AS numbers in extended communities (<rfc id="5668">).
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<sect1>Supported standards:
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<label id="bgp-standards">
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For IPv6, it uses the standard multiprotocol extensions defined in
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<rfc id="4760"> and applied to IPv6 according to <rfc id="2545">.
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<itemize>
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<item> <rfc id="4271"> - Border Gateway Protocol 4 (BGP)
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<item> <rfc id="1997"> - BGP Communities Attribute
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<item> <rfc id="2385"> - Protection of BGP Sessions via TCP MD5 Signature
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<item> <rfc id="2545"> - Use of BGP Multiprotocol Extensions for IPv6
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<item> <rfc id="2918"> - Route Refresh Capability
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<item> <rfc id="3107"> - Carrying Label Information in BGP
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<item> <rfc id="4360"> - BGP Extended Communities Attribute
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<item> <rfc id="4364"> - BGP/MPLS IPv4 Virtual Private Networks
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<item> <rfc id="4456"> - BGP Route Reflection
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<item> <rfc id="4486"> - Subcodes for BGP Cease Notification Message
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<item> <rfc id="4659"> - BGP/MPLS IPv6 Virtual Private Networks
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<item> <rfc id="4724"> - Graceful Restart Mechanism for BGP
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<item> <rfc id="4760"> - Multiprotocol extensions for BGP
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<item> <rfc id="4798"> - Connecting IPv6 Islands over IPv4 MPLS
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<item> <rfc id="5065"> - AS confederations for BGP
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<item> <rfc id="5082"> - Generalized TTL Security Mechanism
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<item> <rfc id="5492"> - Capabilities Advertisement with BGP
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<item> <rfc id="5549"> - Advertising IPv4 NLRI with an IPv6 Next Hop
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<item> <rfc id="5575"> - Dissemination of Flow Specification Rules
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<item> <rfc id="5668"> - 4-Octet AS Specific BGP Extended Community
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<item> <rfc id="6286"> - AS-Wide Unique BGP Identifier
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<item> <rfc id="6608"> - Subcodes for BGP Finite State Machine Error
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<item> <rfc id="6793"> - BGP Support for 4-Octet AS Numbers
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<item> <rfc id="7313"> - Enhanced Route Refresh Capability for BGP
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<item> <rfc id="7606"> - Revised Error Handling for BGP UPDATE Messages
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<item> <rfc id="7911"> - Advertisement of Multiple Paths in BGP
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<item> <rfc id="7947"> - Internet Exchange BGP Route Server
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<item> <rfc id="8092"> - BGP Large Communities Attribute
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</itemize>
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<sect1>Route selection rules
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<label id="bgp-route-select-rules">
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@ -67,6 +67,38 @@
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* point of view and therefore maintaining received routes. Routing table
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* refresh cycle (rt_refresh_begin(), rt_refresh_end()) is used for removing
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* stale routes after reestablishment of BGP session during graceful restart.
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*
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* Supported standards:
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* <itemize>
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* <item> <rfc id="4271"> - Border Gateway Protocol 4 (BGP)
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* <item> <rfc id="1997"> - BGP Communities Attribute
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* <item> <rfc id="2385"> - Protection of BGP Sessions via TCP MD5 Signature
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* <item> <rfc id="2545"> - Use of BGP Multiprotocol Extensions for IPv6
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* <item> <rfc id="2918"> - Route Refresh Capability
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* <item> <rfc id="3107"> - Carrying Label Information in BGP
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* <item> <rfc id="4360"> - BGP Extended Communities Attribute
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* <item> <rfc id="4364"> - BGP/MPLS IPv4 Virtual Private Networks
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* <item> <rfc id="4456"> - BGP Route Reflection
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* <item> <rfc id="4486"> - Subcodes for BGP Cease Notification Message
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* <item> <rfc id="4659"> - BGP/MPLS IPv6 Virtual Private Networks
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* <item> <rfc id="4724"> - Graceful Restart Mechanism for BGP
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* <item> <rfc id="4760"> - Multiprotocol extensions for BGP
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* <item> <rfc id="4798"> - Connecting IPv6 Islands over IPv4 MPLS
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* <item> <rfc id="5065"> - AS confederations for BGP
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* <item> <rfc id="5082"> - Generalized TTL Security Mechanism
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* <item> <rfc id="5492"> - Capabilities Advertisement with BGP
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* <item> <rfc id="5549"> - Advertising IPv4 NLRI with an IPv6 Next Hop
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* <item> <rfc id="5575"> - Dissemination of Flow Specification Rules
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* <item> <rfc id="5668"> - 4-Octet AS Specific BGP Extended Community
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* <item> <rfc id="6286"> - AS-Wide Unique BGP Identifier
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* <item> <rfc id="6608"> - Subcodes for BGP Finite State Machine Error
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* <item> <rfc id="6793"> - BGP Support for 4-Octet AS Numbers
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* <item> <rfc id="7313"> - Enhanced Route Refresh Capability for BGP
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* <item> <rfc id="7606"> - Revised Error Handling for BGP UPDATE Messages
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* <item> <rfc id="7911"> - Advertisement of Multiple Paths in BGP
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* <item> <rfc id="7947"> - Internet Exchange BGP Route Server
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* <item> <rfc id="8092"> - BGP Large Communities Attribute
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* </itemize>
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*/
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#undef LOCAL_DEBUG
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@ -90,9 +90,9 @@ struct bgp_config {
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int deterministic_med; /* Use more complicated algo to have strict RFC 4271 MED comparison */
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u32 default_local_pref; /* Default value for LOCAL_PREF attribute */
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u32 default_med; /* Default value for MULTI_EXIT_DISC attribute */
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int capabilities; /* Enable capability handshake [RFC 3392] */
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int capabilities; /* Enable capability handshake [RFC 5492] */
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int enable_refresh; /* Enable local support for route refresh [RFC 2918] */
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int enable_as4; /* Enable local support for 4B AS numbers [RFC 4893] */
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int enable_as4; /* Enable local support for 4B AS numbers [RFC 6793] */
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int enable_extended_messages; /* Enable local support for extended messages [draft] */
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u32 rr_cluster_id; /* Route reflector cluster ID, if different from local ID */
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int rr_client; /* Whether neighbor is RR client of me */
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@ -470,7 +470,7 @@ bgp_read_capabilities(struct bgp_conn *conn, struct bgp_caps *caps, byte *pos, i
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}
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break;
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case 65: /* AS4 capability, RFC 4893 */
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case 65: /* AS4 capability, RFC 6793 */
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if (cl != 4)
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goto err;
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