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BGP: Minor improvements to BGP roles 

Add support for bgp_otc in filters and warning for configuration
inside confederations.
This commit is contained in:
Ondrej Zajicek 2022-07-12 15:03:17 +02:00
parent c73b5d2d3d
commit 971721c9b5
3 changed files with 9 additions and 3 deletions
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3
doc/bird.sgml
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@ -2829,7 +2829,8 @@ using the following configuration parameters:
leaks created by third parties.
This option is valid for EBGP sessions, but it is not recommended to be
used within AS confederations.
used within AS confederations (which would require manual filtering of
<cf/bgp_otc/ attribute on confederation boundaries).
Possible <cf><m/role-name/</cf> values are: <cf/provider/,
<cf/rs_server/, <cf/rs_client/, <cf/customer/ and <cf/peer/.

5
proto/bgp/bgp.c
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@ -1987,6 +1987,9 @@ bgp_postconfig(struct proto_config *CF)
if (internal && (cf->local_role != BGP_ROLE_UNDEFINED))
cf_error("Local role cannot be set on IBGP sessions");
if (interior && (cf->local_role != BGP_ROLE_UNDEFINED))
log(L_WARN "BGP roles are not recommended to be used within AS confederations");
if (cf->require_roles && (cf->local_role == BGP_ROLE_UNDEFINED))
cf_error("Local role must be set if roles are required");
@ -2357,7 +2360,7 @@ bgp_format_role_name(u8 role)
{
static const char *bgp_role_names[] = { "provider", "rs_server", "rs_client", "customer", "peer" };
if (role == BGP_ROLE_UNDEFINED) return "undefined";
if (role < 5) return bgp_role_names[role];
if (role < ARRAY_SIZE(bgp_role_names)) return bgp_role_names[role];
return "?";
}

4
proto/bgp/config.Y
View File

@ -32,7 +32,7 @@ CF_KEYWORDS(BGP, LOCAL, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY, KEEPALIVE,
LIVED, STALE, IMPORT, IBGP, EBGP, MANDATORY, INTERNAL, EXTERNAL, SETS,
DYNAMIC, RANGE, NAME, DIGITS, BGP_AIGP, AIGP, ORIGINATE, COST, ENFORCE,
FIRST, FREE, VALIDATE, BASE, ROLE, ROLES, PEER, PROVIDER, CUSTOMER,
RS_SERVER, RS_CLIENT, REQUIRE)
RS_SERVER, RS_CLIENT, REQUIRE, BGP_OTC)
%type <i> bgp_nh
%type <i32> bgp_afi
@ -355,6 +355,8 @@ dynamic_attr: BGP_AIGP
{ $$ = f_new_dynamic_attr(EAF_TYPE_OPAQUE, T_ENUM_EMPTY, EA_CODE(PROTOCOL_BGP, BA_AIGP)); } ;
dynamic_attr: BGP_LARGE_COMMUNITY
{ $$ = f_new_dynamic_attr(EAF_TYPE_LC_SET, T_LCLIST, EA_CODE(PROTOCOL_BGP, BA_LARGE_COMMUNITY)); } ;
dynamic_attr: BGP_OTC
{ $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_CODE(PROTOCOL_BGP, BA_ONLY_TO_CUSTOMER)); } ;