OSPF Question
What is the difference between
A)
int fa0/0
ip add x.x.x.x y.y.y.y
no shut
router ospf 1
net x.x.x.x <y wildcard mask> area 0
VS
int fa0/0
ip add x.x.x.x y.y.y.y
ip ospf 1 area 0
no shut
Both of them achieve the same purpose so why the difference?
A)
int fa0/0
ip add x.x.x.x y.y.y.y
no shut
router ospf 1
net x.x.x.x <y wildcard mask> area 0
VS
int fa0/0
ip add x.x.x.x y.y.y.y
ip ospf 1 area 0
no shut
Both of them achieve the same purpose so why the difference?
Comments
-
atorven
Member Posts: 319
No difference at all, except for admin purposes i.e. if you had to enable ospf on a router with loads of interfaces, option A would be the quickest. -
EdTheLad
Member Posts: 2,111 ■■■■□□□□□□
What is the difference between
Both of them achieve the same purpose so why the difference?
B is the newer Cisco preferred method, it wasn't always available where as A is from day one ospf config. XR only supports B which is the direction cisco is moving towards.Networking, sometimes i love it, mostly i hate it.Its all about the $$$$ -
xnx
Member Posts: 464 ■■■□□□□□□□
I use method B as it's easier to follow when reading through configurationsGetting There ...
Lab Equipment: Using Cisco CSRs and 4 Switches currently -
DKempeneers
Banned Posts: 36 ■■□□□□□□□□
I think that B is only way to declare a net/int into OSPFv3
EdTheLad can you confirm ? -
mackenzae
Member Posts: 77 ■□□□□□□□□□
Option B would also help prune which interfaces send out Hello messages compared to option A especially if your network command encompasses a large network range like a class A
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Fitzi
Member Posts: 40 ■■■□□□□□□□
DKempeneers wrote: »I think that B is only way to declare a net/int into OSPFv3
EdTheLad can you confirm ?
Yes, for IPv6 both ospfv3 and eigrp require configuration per/on the interface. -
eten
Member Posts: 67 ■■□□□□□□□□
same results in this example, but when configured under the interface where a secondary IP address exist, it will be included in the ospf process.
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phantasm
Member Posts: 995
No difference at all, except for admin purposes i.e. if you had to enable ospf on a router with loads of interfaces, option A would be the quickest.
Learn to script. Option B is the new standard and as stated, OSPFv3 and EIGRP for IPv6 only support per interface configuration. In the end it's much neater anyway. I prefer the way it looks."No man ever steps in the same river twice, for it's not the same river and he's not the same man." -Heraclitus
