07-09-2019 12:59 AM
Hi,
For ospf config below.
1)May I knw wht the command no passive-interface TenGigabitEthernet1/0/2 does? Wht happen to those interface without this command?
2) network 192.168.70.133 0.0.0.0 area 0, is this command needed for every network tht we wish to include in ospf broadcast under area 0?
3)Does it means that we need "no passive-interface TenGigabitEthernet x/y/z" and "network 192.168.70.133 0.0.0.0 area 0" for ospf broadcast enabled? both needs to enabled for a particular interface and its associated subnet?
router ospf 1
auto-cost reference-bandwidth 100000
redistribute static metric 1000 subnets
passive-interface default
no passive-interface Vlan99
no passive-interface TenGigabitEthernet1/0/2
no passive-interface TenGigabitEthernet1/0/3
no passive-interface TenGigabitEthernet1/0/4
no passive-interface TenGigabitEthernet1/0/5
network 192.168.70.133 0.0.0.0 area 0
network 192.168.70.149 0.0.0.0 area 0
network 192.168.70.161 0.0.0.0 area 0
network 192.168.70.173 0.0.0.0 area 0
network 192.168.13.3 0.0.0.0 area 0
network 192.168.13.66 0.0.0.0 area 0
network 192.168.13.74 0.0.0.0 area 0
default-information originate
07-09-2019 01:29 AM
07-09-2019 01:35 AM
07-09-2019 01:40 AM - edited 07-09-2019 01:42 AM
Hello
Passive interfaces dont allow any routing information to pass through them- so in ospf this means they wont be allowed to form any ospf adjecencys and will be seen in opsf databse as stub networks.
The passive -interafce default is a good feature to have enabled when you are running an IGP on a device that has lots of routed interfaces and you dont wont all of them by default to have the protential to send/recive routing information, However when you do wish to have a specific interface to actively partcipate in the routing process then you canmake that inerface no passvie by specifiying no passive-inteface xxx
09-16-2019 08:19 PM
How can I know whether the loopback IP address of connected devices was OSPF dynamically learn from the back-to-back or LAN interfaces?
how can i see OSPF learned subnets (Loopback IP /128, default routing,etc) in the switch?
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