OSPF: Route attribute "ospf_tag" lost between different OSPF instances

markus/grundmann markus at grundmann.email
Wed Dec 28 01:33:41 CET 2016


It works!!! I have tried only from one import-filter to one
export-filter and now I see the routes I want.

On 28.12.2016 01:28, markus/grundmann wrote:
> Ondrej that's sounds good but it will only available for two OSPF
> instances  right?
> When I use this variable to store the current tag it will override by
> all other filters.
>
> On 28.12.2016 01:25, Ondrej Zajicek wrote:
>> On Wed, Dec 28, 2016 at 12:49:16AM +0100, markus/grundmann wrote:
>>> I tried to use this "variable" ;-) *lol*
>>>
>>> [snip]
>>>         if ospf_rcv_tag = 510 then {
>>>            ospf_metric1 = SEC_M1_VPN;
>>>            ospf_metric2 = SEC_M2_VPN;
>>>            accept;
>>>         }
>>> [/snap]
>> That was just a contemplation about possible design options.
>>
>> If you need current time workaround, the simplest way is to abuse some
>> other integer attribute (e.g. bgp_med) to store the value [1] in the
>> import filter of the first OSPF instance, then restore it [2] in the
>> export filter of the second OSPF instance. It is a dirty untested
>> trick, but it should work.
>>
>> [1] bgp_med = ospf_tag;
>>
>> [2] ospf_tag = bgp_med;
>>
>


-- 

Best regards,
Markus

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