SNR S2989G-24TX-POE [243/553] Ecmp troubleshooting

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S2989G-24TX Operation Manual

Chapter 4 Routing Protocol Related Configuration

4-18

R4(Config-if-Vlan100)# ip address 100.2.1.1 255.255.255.0

R4(config)#interface Vlan200

R4(Config-if-Vlan200)# ip address 100.2.2.1 255.255.255.0

R4(config)#interface loopback 1

R4(Config-if-loopback1)# ip address 5.5.5.5 255.255.255.255

R4(config)#router ospf 1

R4(config-router)# ospf router-id 4.4.4.4

R4(config-router)# network 100.2.1.0/24 area 0

R4(config-router)# network 100.2.2.0/24 area 0

On R1, show ip route, the following is displayed:

R1(config)#show ip route

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

C 1.1.1.1/32 is directly connected, Loopback1 tag:0

O 5.5.5.5/32 [110/3] via 100.1.1.2, Vlan100, 00:00:05 tag:0

[110/3] via 100.1.2.2, Vlan200, 00:00:05 tag:0

C 100.1.1.0/24 is directly connected, Vlan100 tag:0

C 100.1.2.0/24 is directly connected, Vlan200 tag:0

O 100.2.1.0/24 [110/2] via 100.1.1.2, Vlan100, 00:02:25 tag:0

O 100.2.2.0/24 [110/2] via 100.1.2.2, Vlan200, 00:02:25 tag:0

C 127.0.0.0/8 is directly connected, Loopback tag:0

Total routes are : 8 item(s)

4.4.4

ECMP Troubleshooting

When configuring ECMP, ECMP may not run normally for the reasons of physical

connection and false configuration, so users should note the following essential.

 When using ECMP, load-balance mode should be set as dst-src-ip or dst-src-mac-ip,

after that, load-balance is correct for packets.