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manual: 'Running': tweak, mention 'tunmap' and 'tunend'

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Change-Id: I9760ca214933d0b05080a3e70807b0cd06380a27
This commit is contained in:
Neels Janosch Hofmeyr
2024-01-24 03:41:03 +01:00
committed by laforge
parent 203ce0b34f
commit aa6eabf766
1 changed files with 9 additions and 5 deletions
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14
doc/manuals/chapters/running.adoc
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@@ -85,11 +85,11 @@ improve in the future, see https://osmocom.org/issues/5682 .
OsmoUPF uses two distinct Linux kernel features:
* The GTP module is used for GTP encapsulation/decapsulation from/to
* The GTP module is used for `tunend`: GTP encapsulation/decapsulation from/to
"the internet".
* The netfilter module is used for GTP tunnel proxying, also known as
tunnel forwarding or tunnel mapping.
* The netfilter framework and nftables is used for `tunmap`: GTP tunnel proxying,
also known as tunnel forwarding or tunnel mapping.
.Linux kernel feature usage
[graphviz]
@@ -97,8 +97,12 @@ OsmoUPF uses two distinct Linux kernel features:
include::upf_gtp_roles.dot[]
----
GTP kernel module configuration can be omitted for sites that serve only as GTP
forwarding proxy, without encapsulation/decapsulation of GTP payloads.
GTP kernel module configuration in the `tunend` section can be omitted for sites
that serve only as GTP forwarding proxy, without encapsulation/decapsulation of
GTP payloads.
Likewise, netfilter configuration in the `tunmap` section can be omitted for
sites only serving as GTP tunnel endpoint.
[[gtp_module]]
=== Configure Linux Kernel GTP Module for `tunend`