From: Christian Franke <chris@opensourcerouting.org>
Date: Wed, 23 May 2018 13:37:45 +0000 (+0200)
Subject: fabricd: implement asymmetric metric for tier 0 as per Section 6.2
X-Git-Tag: frr-7.1-dev~384^2~17
X-Git-Url: https://git.puffer.fish/?a=commitdiff_plain;h=a191178d0a500a4f016d22235bed13790fd6968e;p=mirror%2Ffrr.git

fabricd: implement asymmetric metric for tier 0 as per Section 6.2

To avoid passing of traffic via leaf nodes in the fabric, OpenFabric
specifies that all links towards tier 0 nodes should be advertised with
a very high metric.

Signed-off-by: Christian Franke <chris@opensourcerouting.org>
---

diff --git a/isisd/isis_lsp.c b/isisd/isis_lsp.c
index f8ebce2efd..b7e0b4b553 100644
--- a/isisd/isis_lsp.c
+++ b/isisd/isis_lsp.c
@@ -1100,9 +1100,16 @@ static void lsp_build(struct isis_lsp *lsp, struct isis_area *area)
 						 */
 						subtlv_len = 0;
 
+					uint32_t neighbor_metric;
+					if (fabricd_tier(area) == 0) {
+						neighbor_metric = 0xffe;
+					} else {
+						neighbor_metric = metric;
+					}
+
 					tlvs_add_mt_p2p(lsp->tlvs, circuit,
-							ne_id, metric, subtlvs,
-							subtlv_len);
+							ne_id, neighbor_metric,
+							subtlvs, subtlv_len);
 				}
 			} else {
 				lsp_debug(