bgp: add local_as support to BGP_NEIGHBOR template#26556
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briantopping wants to merge 1 commit intosonic-net:masterfrom
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bgp: add local_as support to BGP_NEIGHBOR template#26556briantopping wants to merge 1 commit intosonic-net:masterfrom
briantopping wants to merge 1 commit intosonic-net:masterfrom
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Add support for the local_as attribute in the BGP_NEIGHBOR CONFIG_DB table. When local_as is defined for a neighbor, the template renders: neighbor <addr> local-as <asn> no-prepend replace-as This enables operators to present a different AS number to specific peers while using a single internal AS for iBGP. Common use case: sites running iBGP internally with a private AS while presenting a public AS to upstream PE routers. Matches the local_as attribute schema used in Dell Enterprise SONiC for the BGP_NEIGHBOR and BGP_PEER_GROUP tables.
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Summary
local_asattribute support to the general BGP neighbor instance templatelocal_asis defined inBGP_NEIGHBORCONFIG_DB table, rendersneighbor <addr> local-as <asn> no-prepend replace-asin FRR configbgp_session)Motivation
Operators running iBGP internally with a private AS need to present a different (public) AS to upstream PE routers via
local-as. This is a standard BGP deployment pattern for multi-site networks.Dell Enterprise SONiC already supports the
local_asattribute inBGP_NEIGHBORandBGP_PEER_GROUPtables. This patch brings the same capability to community SONiC by adding the corresponding template logic.Example CONFIG_DB usage
Produces in FRR:
Test plan
local-aspresenting AS 10595 while router runs AS 65001local_asattribute are unaffected (conditional renders nothing)🤖 Generated with Claude Code