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global features
So this is a big update.
The first thing that was done was a refactor to the FRR LDP template, MPLS handler, and XML conf tree MPLS global additions.
The refactors should work and I did test them in my lab. It seems that everything does work as needed so far in my testing.
There is something here that is considered configuration breaking from the old setup though. In the old setup the MPLS interface operation (as in the interfaces accepting MPLS labels and processing them) was tied with LDP. What this means is that MPLS processing was enabled at the same time as LDP interfaces were configured. We do not want this behavior for the future as there's other MPLS underlay technologies like SR and RSVP. If someone wants to enable SR or RSVP without enabling LDP then they now can. Before, they couldn't. The other additions are global changes to MPLS TTL propagation and MPLS max TTL enforcement. They have now been added.
Lastly, there is an frr-reload bug that Runar Borge found with this. We have found that when totally deleting LDP that there has to be 3 commits done. This is because frr-reload doesn't properly do what it needs to do in 1 operation so we had to do 3. This will only affect people that are doing an entire LDP clear using "delete protocols mpls ldp." Otherwise it isn't seen.
Anyway, this refactor now works with the FRR daemon directly for all changes. This also makes it much easier for adding stuff in the future.
Thank you
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This commit has to do with the addition of miscellaneous MPLS parameters, as well as miscellaneous LDP parameters. Per c-po, for miscellaneous options and whatnot that do not fit anywhere we will put them into a specific "parameters" node.
I also did some global linux configuration changes here. We make changes to kernel options "net.mpls.ip_ttl_propagate" and "net.mpls.default_ttl" which should allow the behavior of VyOS to have the same as routers from the big vendors.
I added two LDP options for cisco interoperation TLV and for a dual stack preference.
Lastly, I went through and changes some of the help/description fields in the definitions page because I just felt they weren't uniform and the words seemed to not properly explain what they were doing. I also did some code clean up (or tried to...) with comments and whatnot.
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The commit has to do with the addition of targeted LDP neighbors and parameters being added. FRR allows for this functionality and I just wanted to add it.
We have basically 4 options that are added. Enabling targeted LDP functionality, the targeted neighbor, the hello interval of targeted sessions, and the hold time of targeted sessions. Both IPv4 and IPv6 has been coded in.
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The commit has to do with the addition of session hold time parameter for LDP neighbors. This allows for being able to change said hold time on a static neighbor.
The way that this works is to have it either delegated to a value (15-65535), or to just be default to whatever FRR stipulates or per the other session configuration values.
I opted to remove the "-ipv4-" only because we know it's an IPv4 session that one has to create first. I figure it's redundant to add it there so I removed it.
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The commit has to do with the addition of TTL security for LDP neighbors. The code was 90% done by Viascheslav. I modified it a little bit to get it to properly work.
We added more parameters to the neighbors dynamic loop. Once this is merged then we should be able to add more for the dynamic neighbor statements.
The way that this works is to have either TTL disabled, or to add the amount of hops accepted for the neighbor.
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The commit has to do with separating the hello/hold timers from being only IPv4 to being both IPv4 and IPv6.
I renamed the existing hello and hold timers with an "-ipv4" and added ones that were "-ipv6". I did verify that the commands properly commit under FRR as well. I also added some room on the protocols_mpls.py file for the different variables as it seems we're might end up having longer names. Removed some spaces that I found too that weren't needed on ldpd.frr.tmpl as well.
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airbag must now be explicitly installed.
the patch also allow to fully disables the installation of the logging
code at setup (and not just installing and doing nothing)
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convert all call to jinja to use template.render
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os.system does print the ouput of the command, run() does not.
A new function called call() does the printing and return the error code.
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As little change a possible but the function call
The behaviour should be totally unchanged.
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