This is my current setup where i have
40Gbps links between all 4 switches running
OSPF using L3 links between them but now i want to double my bandwidth between switches so i am planning to add (dotted links) L3 links and let OSPF load-balance traffic on them, Do you think is there any issue to doing that or this is going to be just fine? ( want second set of eyes )
This is what my ospf config looks on all 4 switches.
interface Ethernet2/10 no switchport mtu 9216 ip address 192.168.250.9/30 no ip ospf passive-interface ip router ospf 100 area 0.0.0.0 no shutdown interface Ethernet2/11 no switchport mtu 9216 ip address 192.168.250.13/30 no ip ospf passive-interface ip router ospf 100 area 0.0.0.0 no shutdown
More details about current traffic flow
my current traffic flow looks like following diagram at present
SW is active BGP switch so all in/out traffic from coming from ISP. then SW1 do load-sharing between two SW3/4 using OSPF ECMP. Last 1 years we have no single complain about voice issue or quality issue ( everyone is happy ). Now when my SW1 is failed then OSPF move BGP route to SW2 and make it
active and traffic start flowing from SW2 to SW3/4 ( I have tested this multiple time by manually shifting BGP )
Update - 2
Load-sharing info for OSPF/ECMP
I have following load-sharing configured which is default on cisco nexus switches.
# show ip load-sharing IPv4/IPv6 ECMP load sharing: Universal-id (Random Seed): 2223335843 Load-share mode : address source-destination port source-destination GRE-Outer hash is disabled. Concatenation is disabled.