ipng/ipng.ch
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Replace all post_url with Hugo ref blocks

Browse Source
This commit is contained in:
Pim van Pelt
2024-08-05 01:43:55 +02:00
parent c1f1775c91
commit a2f10236a3
56 changed files with 221 additions and 241 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
content/articles/2023-05-17-vpp-mpls-2.md
View File

@ -15,14 +15,13 @@ are shared between the two.
I've deployed an MPLS core for IPng Networks, which allows me to provide L2VPN services, and at the
same time keep an IPng Site Local network with IPv4 and IPv6 that is separate from the internet,
based on hardware/silicon based forwarding at line rate and high availability. You can read all
about my Centec MPLS shenanigans in [[this article]({% post_url 2023-03-11-mpls-core %})].
about my Centec MPLS shenanigans in [[this article]({{< ref "2023-03-11-mpls-core" >}})].
In the last article, I explored VPP's MPLS implementation a little bit. All the while,
[@vifino](https://chaos.social/@vifino) has been tinkering with the Linux Control Plane and adding
MPLS support to it, and together we learned a lot about how VPP does MPLS forwarding and how it
sometimes differs to other implementations. During the process, we talked a bit about
_implicit-null_ and _explicit-null_. When my buddy Fred read the [[previous article]({% post_url
2023-05-07-vpp-mpls-1 %})], he also talked about a feature called _penultimate-hop-popping_ which
_implicit-null_ and _explicit-null_. When my buddy Fred read the [[previous article]({{< ref "2023-05-07-vpp-mpls-1" >}})], he also talked about a feature called _penultimate-hop-popping_ which
maybe deserves a bit more explanation. At the same time, I could not help but wonder what the
performance is of VPP as a _P-Router_ and _PE-Router_, compared to say IPv4 forwarding.
@ -32,7 +31,7 @@ performance is of VPP as a _P-Router_ and _PE-Router_, compared to say IPv4 forw
For this article, I'm going to boot up instance LAB1 with no changes (for posterity, using image
`vpp-proto-disk0@20230403-release`), and it will be in the same state it was at the end of my
previous [[MPLS article]({% post_url 2023-05-07-vpp-mpls-1 %})]. To recap, there are four routers
previous [[MPLS article]({{< ref "2023-05-07-vpp-mpls-1" >}})]. To recap, there are four routers
daisychained in a string, and they are called `vpp1-0` through `vpp1-3`. I've then connected a
Debian virtual machine on both sides of the string. `host1-0.enp16s0f3` connects to `vpp1-3.e2`
and `host1-1.enp16s0f0` connects to `vpp1-0.e3`. Finally, recall that all of the links between these
@ -286,7 +285,7 @@ operation performed on a packet does cost valuable CPU cycles.
I can't really perform a loadtest on the virtual machines backed by Open vSwitch, while tightly
packing six machines on one hypervisor. That setup is made specifically to do functional testing and
development work. To do a proper loadtest, I will need bare metal. So, I grabbed three Supermicro
SYS-5018D-FN8T, which I'm running throughout [[AS8298]({% post_url 2021-02-27-network %})], as I
SYS-5018D-FN8T, which I'm running throughout [[AS8298]({{< ref "2021-02-27-network" >}})], as I
know their performance quite well. I'll take three of these, and daisychain them with TenGig ports.
This way, I can take a look at the cost of _P-Routers_ (which only SWAP MPLS labels and forward the
result), as well as _PE-Routers_ (which have to encapsulate, and sometimes decapsulate the IP or
@ -295,7 +294,7 @@ Ethernet traffic).
These machines get a fresh Debian Bookworm install and VPP 23.06 without any plugins. It's weird for
me to run a VPP instance without Linux CP, but in this case I'm going completely vanilla, so I
disable all plugins and give each VPP machine one worker thread. The install follows my popular
[[VPP-7]({% post_url 2021-09-21-vpp-7 %})]. By the way did you know that you can just type the search query [VPP-7] directly into Google to find this article. Am I an influencer now? Jokes aside, I decide to call the bare metal machines _France_,
[[VPP-7]({{< ref "2021-09-21-vpp-7" >}})]. By the way did you know that you can just type the search query [VPP-7] directly into Google to find this article. Am I an influencer now? Jokes aside, I decide to call the bare metal machines _France_,
_Belgium_ and _Netherlands_. And because if it ain't dutch, it ain't much, the Netherlands machine
sits on top :)