Re: [AFMUG] OSPF Question

[Steve Jones]

That's odd, everything I ever touched is default type 1.

On Sun, May 13, 2018, 5:18 PM George Skorup 
wrote:

> The OSPF state machine always prefers an E1 route over an E2 route.
> There's more stuff like multiple areas and ABRs, ASBRs and all that which I
> don't really care about for a couple dozen routers and a single AS. But
> I've always used E1 for the default route. Don't ask me why. Mostly because
> I don't remember. But it was probably some MikroTik bug at some point.
>
> On 5/13/2018 4:53 PM, Matt Hoppes wrote:
>
> So why is type 2 the default on most routers?  For what reason would you
> use an E2 over an E1?
>
> On May 13, 2018, at 17:40, Matt Hoppes 
> wrote:
>
> O. They are all going out as Metric-type 2
>
> On May 13, 2018, at 17:37, Matt Hoppes 
> wrote:
>
> Correct. A is distributing default route. Directly to C (in theory but not
> happening) and to B which is distributing to C currently.
>
> This is edgeOS.
>
> I’m actually not sure. I’ll have to check on E1 vs E2.
>
> On May 13, 2018, at 17:26, George Skorup  wrote:
>
> OK, so only A is distributing the default route. as-type-1 or as-type-2?
> E1 takes path costs into account. E2 does not.
>
> Bounce a neighbor and see if it fixes itself. I assume RouterOS. I've seen
> weird stuff like this happen before.
>
> On 5/13/2018 4:15 PM, Matt Hoppes wrote:
>
> Only one - the Long one.
>
> The things connected to A take the direct path but the default is not
> coming through for some reason.
>
> On May 13, 2018, at 17:12, George Skorup  wrote:
>
> How many default routes show up in the LSA table?
>
> On 5/13/2018 3:51 PM, Matt Hoppes wrote:
>
> OSPF question:
>
>
> A—-B—-C
>
> And
>
> A——C
>
>
> A is the Internet peering router.
>
>
> C should end up with two default routes in it correct?
>
>
> One through B and one directly to C?
>
>
> What’s odd is everything on A populated on Cs route table as direct routes
> - except for the default route.
>
>
>
>
>

Re: [AFMUG] OSPF Question

[George Skorup]

The OSPF state machine always prefers an E1 route over an E2 route. 
There's more stuff like multiple areas and ABRs, ASBRs and all that 
which I don't really care about for a couple dozen routers and a single 
AS. But I've always used E1 for the default route. Don't ask me why. 
Mostly because I don't remember. But it was probably some MikroTik bug 
at some point.


On 5/13/2018 4:53 PM, Matt Hoppes wrote:
So why is type 2 the default on most routers?  For what reason would 
you use an E2 over an E1?


On May 13, 2018, at 17:40, Matt Hoppes 
> wrote:



O. They are all going out as Metric-type 2

On May 13, 2018, at 17:37, Matt Hoppes 
> wrote:


Correct. A is distributing default route. Directly to C (in theory 
but not happening) and to B which is distributing to C currently.


This is edgeOS.

I’m actually not sure. I’ll have to check on E1 vs E2.

On May 13, 2018, at 17:26, George Skorup > wrote:


OK, so only A is distributing the default route. as-type-1 or 
as-type-2? E1 takes path costs into account. E2 does not.


Bounce a neighbor and see if it fixes itself. I assume RouterOS. 
I've seen weird stuff like this happen before.


On 5/13/2018 4:15 PM, Matt Hoppes wrote:

Only one - the Long one.

The things connected to A take the direct path but the default is 
not coming through for some reason.


On May 13, 2018, at 17:12, George Skorup > wrote:



How many default routes show up in the LSA table?

On 5/13/2018 3:51 PM, Matt Hoppes wrote:


OSPF question:


A—-B—-C

And

A——C


A is the Internet peering router.


C should end up with two default routes in it correct?


One through B and one directly to C?


What’s odd is everything on A populated on Cs route table as 
direct routes - except for the default route.

Re: [AFMUG] OSPF Question

[Matt Hoppes]

So why is type 2 the default on most routers?  For what reason would you use an 
E2 over an E1?

> On May 13, 2018, at 17:40, Matt Hoppes  
> wrote:
> 
> O. They are all going out as Metric-type 2
> 
>> On May 13, 2018, at 17:37, Matt Hoppes  
>> wrote:
>> 
>> Correct. A is distributing default route. Directly to C (in theory but not 
>> happening) and to B which is distributing to C currently. 
>> 
>> This is edgeOS. 
>> 
>> I’m actually not sure. I’ll have to check on E1 vs E2. 
>> 
>>> On May 13, 2018, at 17:26, George Skorup  wrote:
>>> 
>>> OK, so only A is distributing the default route. as-type-1 or as-type-2? E1 
>>> takes path costs into account. E2 does not.
>>> 
>>> Bounce a neighbor and see if it fixes itself. I assume RouterOS. I've seen 
>>> weird stuff like this happen before.
>>> 
 On 5/13/2018 4:15 PM, Matt Hoppes wrote:
 Only one - the Long one. 
 
 The things connected to A take the direct path but the default is not 
 coming through for some reason. 
 
 On May 13, 2018, at 17:12, George Skorup  wrote:
 
> How many default routes show up in the LSA table?
> 
>> On 5/13/2018 3:51 PM, Matt Hoppes wrote:
>> OSPF question:
>> 
>> A—-B—-C
>> And
>> A——C
>> 
>> A is the Internet peering router. 
>> 
>> C should end up with two default routes in it correct?
>> 
>> One through B and one directly to C?
>> 
>> What’s odd is everything on A populated on Cs route table as direct 
>> routes - except for the default route.
> 
>>> 

Re: [AFMUG] OSPF Question

[Matt Hoppes]

O. They are all going out as Metric-type 2

> On May 13, 2018, at 17:37, Matt Hoppes  
> wrote:
> 
> Correct. A is distributing default route. Directly to C (in theory but not 
> happening) and to B which is distributing to C currently. 
> 
> This is edgeOS. 
> 
> I’m actually not sure. I’ll have to check on E1 vs E2. 
> 
>> On May 13, 2018, at 17:26, George Skorup  wrote:
>> 
>> OK, so only A is distributing the default route. as-type-1 or as-type-2? E1 
>> takes path costs into account. E2 does not.
>> 
>> Bounce a neighbor and see if it fixes itself. I assume RouterOS. I've seen 
>> weird stuff like this happen before.
>> 
>>> On 5/13/2018 4:15 PM, Matt Hoppes wrote:
>>> Only one - the Long one. 
>>> 
>>> The things connected to A take the direct path but the default is not 
>>> coming through for some reason. 
>>> 
>>> On May 13, 2018, at 17:12, George Skorup  wrote:
>>> 
 How many default routes show up in the LSA table?
 
> On 5/13/2018 3:51 PM, Matt Hoppes wrote:
> OSPF question:
> 
> A—-B—-C
> And
> A——C
> 
> A is the Internet peering router. 
> 
> C should end up with two default routes in it correct?
> 
> One through B and one directly to C?
> 
> What’s odd is everything on A populated on Cs route table as direct 
> routes - except for the default route.
 
>> 

Re: [AFMUG] OSPF Question

[Matt Hoppes]

Correct. A is distributing default route. Directly to C (in theory but not 
happening) and to B which is distributing to C currently. 

This is edgeOS. 

I’m actually not sure. I’ll have to check on E1 vs E2. 

> On May 13, 2018, at 17:26, George Skorup  wrote:
> 
> OK, so only A is distributing the default route. as-type-1 or as-type-2? E1 
> takes path costs into account. E2 does not.
> 
> Bounce a neighbor and see if it fixes itself. I assume RouterOS. I've seen 
> weird stuff like this happen before.
> 
>> On 5/13/2018 4:15 PM, Matt Hoppes wrote:
>> Only one - the Long one. 
>> 
>> The things connected to A take the direct path but the default is not coming 
>> through for some reason. 
>> 
>> On May 13, 2018, at 17:12, George Skorup  wrote:
>> 
>>> How many default routes show up in the LSA table?
>>> 
 On 5/13/2018 3:51 PM, Matt Hoppes wrote:
 OSPF question:
 
 A—-B—-C
 And
 A——C
 
 A is the Internet peering router. 
 
 C should end up with two default routes in it correct?
 
 One through B and one directly to C?
 
 What’s odd is everything on A populated on Cs route table as direct routes 
 - except for the default route.
>>> 
> 

Re: [AFMUG] OSPF Question

[George Skorup]

OK, so only A is distributing the default route. as-type-1 or as-type-2? 
E1 takes path costs into account. E2 does not.


Bounce a neighbor and see if it fixes itself. I assume RouterOS. I've 
seen weird stuff like this happen before.


On 5/13/2018 4:15 PM, Matt Hoppes wrote:

Only one - the Long one.

The things connected to A take the direct path but the default is not 
coming through for some reason.


On May 13, 2018, at 17:12, George Skorup > wrote:



How many default routes show up in the LSA table?

On 5/13/2018 3:51 PM, Matt Hoppes wrote:


OSPF question:


A—-B—-C

And

A——C


A is the Internet peering router.


C should end up with two default routes in it correct?


One through B and one directly to C?


What’s odd is everything on A populated on Cs route table as direct 
routes - except for the default route.

Re: [AFMUG] OSPF Question

[Matt Hoppes]

Identical. Shouldn’t they both still show up on the routing table?

> On May 13, 2018, at 17:17, Adair Winter  wrote:
> 
> What are your path costs? 
> 
>> On Sun, May 13, 2018, 4:15 PM Matt Hoppes 
>>  wrote:
>> Only one - the Long one. 
>> 
>> The things connected to A take the direct path but the default is not coming 
>> through for some reason. 
>> 
>>> On May 13, 2018, at 17:12, George Skorup  wrote:
>>> 
>>> How many default routes show up in the LSA table?
>>> 
 On 5/13/2018 3:51 PM, Matt Hoppes wrote:
 OSPF question:
 
 A—-B—-C
 And
 A——C
 
 A is the Internet peering router. 
 
 C should end up with two default routes in it correct?
 
 One through B and one directly to C?
 
 What’s odd is everything on A populated on Cs route table as direct routes 
 - except for the default route.
>>> 

Re: [AFMUG] OSPF Question

[Adair Winter]

What are your path costs?

On Sun, May 13, 2018, 4:15 PM Matt Hoppes 
wrote:

> Only one - the Long one.
>
> The things connected to A take the direct path but the default is not
> coming through for some reason.
>
> On May 13, 2018, at 17:12, George Skorup  wrote:
>
> How many default routes show up in the LSA table?
>
> On 5/13/2018 3:51 PM, Matt Hoppes wrote:
>
> OSPF question:
>
>
> A—-B—-C
>
> And
>
> A——C
>
>
> A is the Internet peering router.
>
>
> C should end up with two default routes in it correct?
>
>
> One through B and one directly to C?
>
>
> What’s odd is everything on A populated on Cs route table as direct routes
> - except for the default route.
>
>
>

Re: [AFMUG] OSPF Question

[Matt Hoppes]

Only one - the Long one. 

The things connected to A take the direct path but the default is not coming 
through for some reason. 

> On May 13, 2018, at 17:12, George Skorup  wrote:
> 
> How many default routes show up in the LSA table?
> 
>> On 5/13/2018 3:51 PM, Matt Hoppes wrote:
>> OSPF question:
>> 
>> A—-B—-C
>> And
>> A——C
>> 
>> A is the Internet peering router. 
>> 
>> C should end up with two default routes in it correct?
>> 
>> One through B and one directly to C?
>> 
>> What’s odd is everything on A populated on Cs route table as direct routes - 
>> except for the default route.
> 

Re: [AFMUG] OSPF Question

[George Skorup]

How many default routes show up in the LSA table?

On 5/13/2018 3:51 PM, Matt Hoppes wrote:


OSPF question:


A—-B—-C

And

A——C


A is the Internet peering router.


C should end up with two default routes in it correct?


One through B and one directly to C?


What’s odd is everything on A populated on Cs route table as direct 
routes - except for the default route.