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isisd: Advertise SRv6 Locator in Prefix Reach TLV

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According to RFC 9352 section #5, the SRv6 Locators associated with
algorithms 0 and 1 should be also advertised in a Prefix Reachability
TLV (236 or 237) to allow legacy routers (i.e., routers that do not
support SRv6) installing a forwarding entry for algorithms 0 and 1 SRv6
traffic.

This commits extend IS-IS to advertise SRv6 Locators in IPv6
Reachability TLV.

Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
This commit is contained in:
Carmine Scarpitta 2022-12-06 21:54:25 +01:00
parent 48d1cd1748
commit 604fcd30db
1 changed files with 4 additions and 0 deletions
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4
isisd/isis_lsp.c
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@ -1262,6 +1262,10 @@ static void lsp_build(struct isis_lsp *lsp, struct isis_area *area)
area->area_tag);
list_delete(&locator.srv6_sid);
isis_tlvs_add_ipv6_reach(lsp->tlvs,
isis_area_ipv6_topology(area),
&chunk->prefix, 0, false, NULL);
}
/* IPv4 address and TE router ID TLVs.