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WatchGuard Technologies | kA10H000000g3TvSAI
ECMP is not supported for a mixture of static and dynamic routes
Last update date:
5/2/2017
Affected products:
Firebox M200
Firebox M300
Firebox M270
Firebox M370
Firebox M470
Firebox M570
Firebox M670
Firebox M290
Firebox M390
Firebox M400
Firebox M500
Firebox M440
Affected releases:
All
Fireware
11.x
11.1.x
11.10.x
11.10
11.10.1
11.10.2
11.10.3
11.10.4
11.10.5
11.10.6
Fixed releases:
All
Description:
Issue
If you have both static and dynamic routes in your OSPF configuration, and you specify the same metric and distance values for the routes, a conflict occurs. If the link for the default static route fails, the dynamic route activates. However, if the link recovers, the default static route is not added back to the route table. This is because the static and dynamic routes have the same distance and metric values. The Firebox does not support ECMP for a mixture of static and dynamic routes. The Firebox supports: ECMP for dynamic routesECMP for static default routes
Workaround/Solution
If you have both static and dynamic routes, you must specify different metric and distance values for the routes to avoid a conflict. You can only change the metric for dynamic routes, or for static routes that are not default routes. You cannot change the metric for default static routes added for external interfaces. For example, the default static route for an active external interface has a metric of 5. To avoid a conflict, you can assign a metric of 6 to the dynamic route. This list shows the typical metric values for the static default route on an external interface: 5 — Active external interface20 — Unselected active external interface (not involved in Multi-WAN)30 — Modem interface50 — Wireless interface100 — Inactive external interface10/11/12/ (1st/2nd/3rd) — External interfaces in failover mode
