ESR series service routers.ESR-Series. User manual
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11.4  OSFP configuration
OSPF is a dynamic routing protocol, based on link-state technology and using shortest path first Dijkstra 
algorithm.
11.4.1  Configuration algorithm
Step Description Command Keys
1 Configure OSFP precedence for the 
main routing table (optional).
esr(config)# ip protocols ospf 
preference <VALUE>
<VALUE> – protocol 
precedence, takes values in the 
range of [1..255].
Default value: 150.
esr(config-vrf)# ip protocols ospf 
preference <VALUE>
2 Configure OSFP routing tables capacity 
(optional).
esr(config)# ip protocols ospf 
max-routes <VALUE>
<VALUE> – amount of OSPF 
routes in the routing table, 
takes values in the range of:
for 
ESR-1000/1200/1500
/1511/1700/3100 – 
[1..500000];
for ESR-20/21/100/200 
– [1..300000];
for ESR-10/12V(F)/14VF 
– [1..30000]
Default value for the global 
mode:
for 
ESR-1000/1200/1500
/1511/1700/3100 – 
(500000);
for ESR-20/21/100/200 
– (300000);
for ESR-10/12V(F)/14VF 
– (30000).
Default value for VRF: 0
esr(config)# ipv6 protocols ospf 
max-routes <VALUE>
3 Enable the output of OSPF neighbor 
state information (optional).
esr(config)# router ospf log-
adjacency-changes
esr(config)# ipv6 router ospf log-
adjacency-changes
4 Create IP subnets lists that will be used 
for further filtration of advertised and 
received IP routes (optional).
esr(config)# ip prefix-list <NAME> <NAME> – name of a subnet 
list being configured, set by the 
string of up to 31 characters.
esr(config)# ipv6 prefix-list 
<NAME>