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biolim
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OSPF: wrong lsa type

Fri Sep 21, 2018 11:45 am

SG forms lsadb generating lsa5 (as external) for networks of the neighbors router from the same zone (0.0.0.0). I think all this there have to be lsa3. From a zone 10.232.0.0 (linux+bird) the "correct" lsa arrive.
Information transfer from a router 10.16.203.1 in area 10.232.0.0 works only at inclusion of redistribute-other-ospf

sg - 10.10.203.1
kh - 10.16.203.1
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Last edited by biolim on Fri Sep 21, 2018 1:09 pm, edited 1 time in total.
 
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mrz
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 12:43 pm

.. работает только при включении redistribute-other-ospf
It most likely means that kh router uses different OSPF instance than other routers, and those routes from redistribute-other-ospf will be type 5 (external routes).

OSPF creates a type 5 LSA for a subnet that is injected into OSPF from an external source. To inject the route, the autonomous System Border Router (ASBR), which is by definition a router that connects to a non-OSPF routing domain, uses the redistribute command.
 
biolim
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 1:31 pm

It most likely means that kh router uses different OSPF instance than other routers, and those routes from redistribute-other-ospf will be type 5 (external routes).
Both routers use instance "default", area 0.0.0.0
KH# /routing ospf area print
Flags: X - disabled, I - invalid, * - default 
 #    NAME                                   AREA-ID         TYPE    DEFAULT-COST
 0  * backbone                               0.0.0.0         default

SG# /routing ospf area print
Flags: X - disabled, I - invalid, * - default 
 #    NAME                                   AREA-ID         TYPE    DEFAULT-COST
 0  * backbone                               0.0.0.0         default
 1  ;;; PeerVPN     
      10.232.0.0                             10.232.0.0      default
Also:
Flag external isn't set. The router of KH means doesn't inject external routes.
instance=default area=backbone type=router id=10.16.203.1 
   originator=10.16.203.1 sequence-number=0x8000004D age=1074 checksum=0xCBD9 
   options="E" body=
     flags=
         link-type=Stub id=10.11.201.8 data=255.255.255.252 metric=13
         link-type=Stub id=10.16.203.1 data=255.255.255.255 metric=10
         link-type=Stub id=10.16.200.0 data=255.255.255.0 metric=10
         link-type=Stub id=10.16.12.0 data=255.255.255.0 metric=10
         link-type=Stub id=10.16.6.0 data=255.255.255.0 metric=10
         link-type=Stub id=10.16.5.0 data=255.255.255.0 metric=10
         link-type=Stub id=10.16.254.0 data=255.255.255.0 metric=10
         link-type=Point-To-Point id=10.10.203.1 data=10.16.201.2 metric=10
         link-type=Stub id=10.16.201.0 data=255.255.255.252 metric=10
         link-type=Point-To-Point id=10.10.203.1 data=10.16.201.6 metric=11
         link-type=Stub id=10.16.201.4 data=255.255.255.252 metric=11
 
biolim
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 2:54 pm

mikrotik always redistribute connected routes in lsa5?

if mikrotik transfer routes in linux+bird of the same area - bird generates lsa3/4
 
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 3:04 pm

No Type 5 LSA is only if you are redistributing routes via (redistribute-connecte, static, other ospf etc.) as it was mentioned previously
Or when ABR is changing from LSA type 7 to 5 (in case of NSSA)
 
biolim
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 4:19 pm

No Type 5 LSA is only if you are redistributing routes via (redistribute-connecte, static, other ospf etc.) as it was mentioned previously
Or when ABR is changing from LSA type 7 to 5 (in case of NSSA)
How to provide distribution of networks of the interfaces connected to mikrotik with lsa3?
 
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Anumrak
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 4:26 pm

No Type 5 LSA is only if you are redistributing routes via (redistribute-connecte, static, other ospf etc.) as it was mentioned previously
Or when ABR is changing from LSA type 7 to 5 (in case of NSSA)
How to provide distribution of networks of the interfaces connected to mikrotik with lsa3?
Via ABR on the edge of minimum two areas.
 
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 4:27 pm

To clarify what you are trying to do here...

Are you trying to advertise a summary route out of the stub area?

If so, the area range command is what you're looking for.
/routing ospf area range
add advertise=yes area=backbone cost=default disabled=no range=192.168.88.0/24
add advertise=yes area=area1 cost=default disabled=no range=192.168.89.0/24
https://wiki.mikrotik.com/wiki/OSPF/Sum ... ex_example
 
biolim
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 4:47 pm

No Type 5 LSA is only if you are redistributing routes via (redistribute-connecte, static, other ospf etc.) as it was mentioned previously
Or when ABR is changing from LSA type 7 to 5 (in case of NSSA)
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biolim
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 4:57 pm

To clarify what you are trying to do here...

Are you trying to advertise a summary route out of the stub area?
I don't need summation. It is necessary that the networks (10.16.203.1) connected to mikrotik were transferred to the neighboring area as "routes to other area" - lsa 3. Now they are given to other zone as "routes of other domains of routing" - LSA3

The routes transferred from a area 10.232.0.0 (bird/linux is used) are LSA 3/4. Routes LSA5 transferred in a area 0.0.0.0 (mikrotik) even in a area always
Similar situation in the same OSPF domain. area 10.255.0.0

From bird LSA 3 come - and it is correct. Mikrotik creates LSA5 including all networks external.
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Last edited by biolim on Fri Sep 21, 2018 5:14 pm, edited 1 time in total.
 
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Anumrak
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 5:14 pm

To clarify what you are trying to do here...

Are you trying to advertise a summary route out of the stub area?
I don't need summation. It is necessary that the networks (10.16.203.1) connected to mikrotik were transferred to the neighboring area as "routes to other area" - lsa 3. Now they are given to other zone as "routes of other domains of routing" - LSA3

The routes transferred from a area 10.232.0.0 (bird/linux is used) are LSA 3/4. Routes LSA5 transferred in a area 0.0.0.0 (mikrotik) even in a area always
And again - you need routers in different areas.
 
biolim
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 5:16 pm

And again - you need routers in different areas.
SG# /routing ospf area print
Flags: X - disabled, I - invalid, * - default 
 #    NAME                                   AREA-ID         TYPE    DEFAULT-COST
 0  * backbone                               0.0.0.0         default
 1  ;;; PeerVPN     
      10.232.0.0                             10.232.0.0      default
 
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Anumrak
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 5:30 pm

Maybe its generates LSA type 5 cause of default route?
 
biolim
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 5:38 pm

Maybe its generates LSA type 5 cause of default route?
Maybe. I have peeped at the stand at the colleague: are collected 2 microthat in ospf through ptp. In lsadb of the record lsa1 (router) - in body all networks are described. There is no flag of external.
lsa5 - here have got all networks.
Any record lsa3. Is it normal??? Mikrotik always ASBR
 
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Re: OSPF: wrong lsa type

Fri Sep 21, 2018 5:39 pm

Show OSPF config from 10.10.203.1 router

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