OSPF ECMP Settings

[mudvayne15]

Hi Everyone,

I need some help in setting up a load balance for OSPF. I've to google up and was unable to find an answer on how to set up load balancing setup for OSPF. The traffic keeps on routing to only 1 of our internet links that cause congestion. 

I appreciate it if you have an idea how to configure load balancing.

cnshaccent-fw-1 # get router info routing-table all Codes: K - kernel, C - connected, S - static, R - RIP, B - BGP O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default

O*E2 0.0.0.0/0 [110/1] via 192.168.1.1, External, 49w6d00h                          [110/1] via 192.168.1.20, External, 49w6d00h

# get system setting

v4-ecmp-mode : usage-based

# get router ospf abr-type : standard auto-cost-ref-bandwidth: 1000 distance-external : 110 distance-inter-area : 110 distance-intra-area : 110 database-overflow : disable database-overflow-max-lsas: 10000 database-overflow-time-to-recover: 300 default-information-originate: disable default-information-metric: 10 default-information-metric-type: 2 default-information-route-map: default-metric : 10 distance : 110 rfc1583-compatible : disable router-id : x.x.x.x spf-timers : 5 10 bfd : disable distribute-list-in : restart-mode : none restart-period : 120 area: == [ 0.0.0.0 ] id: 0.0.0.0 ospf-interface: == [ External ] name: External network: == [ 1 ]

[emnoc]

Try source based

    config sys global

       set v4-ecmp-mode source-ip-based    end And re monitor Ken Felix

[isamt]

Fortinet KB explains:

https://kb.fortinet.com/kb/viewContent.do?externalId=100137