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fix deploy open5gs-compose #547 #548

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May 7, 2024
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fix deploy open5gs-compose #547 #548

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81abd4c
fix docker-compose.ue2.yaml
PapaySail May 4, 2024
2fdbeb4
turn off tx offload @ new bridge interface
PapaySail May 4, 2024
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18 changes: 17 additions & 1 deletion docs/deployments/open5gs-compose/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -15,14 +15,28 @@ docker network create \
--driver=bridge \
--subnet=172.20.0.0/24 \
--gateway=172.20.0.1 \
-o "com.docker.network.bridge.name"="br-open5gs-main" \
open5gs-main
sudo ethtool -K br-open5gs-main tx off
```

<details><summary><i> Here we turn off tx offload to avoid TCP checksum error in internal packets for iperf tests.</summary>
<p>

Apparently, checksum offloading is enabled by default and the kernel postpones csum calculation until the last moment, expecting csum to be calculated in the driver when the packet is sent. But we have a virtual environment and the packet eventually goes to the GTP tunnel on UPF. Obviously, this is the reason why csum is not calculated correctly.

However, if we disable offloading, the checksum is calculated immediately on iperf and everything works.
</p>
</details>

<!---
# configure firewall

`bash fw.sh`
--><br>
# To run multiple iperf servers, use this command

# for run multiple iperf servers, use this command
`sudo apt install iperf3`

`for i in $(seq 5201 5208); do (iperf3 -s -p $i &) ; done`

Expand Down Expand Up @@ -67,3 +81,5 @@ when test ended, you can see reports in directory `.deploy/docker/local-data/ipe
# stop and remove all containers

`make clean`

`docker network rm open5gs-main`
14 changes: 7 additions & 7 deletions docs/deployments/open5gs-compose/docker-compose.ue2.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@ x-ue-env: &ue_env
APN: internet
SST: 1
SD: "0x222222"
IPERF_HOST: 10.128.0.14
IPERF_HOST: 172.20.0.1
IPERF_TIME: 30

x-ue-service: &ue_service
Expand All @@ -36,47 +36,47 @@ services:
environment:
<<: *ue_env
MSISDN: "0000000003"
GNB_HOSTNAME: open5gs-gnb-1
GNB_HOSTNAME: open5gs-compose-gnb-1
IPERF_PORT: 5201

ue2-04:
<<: *ue_service
environment:
<<: *ue_env
MSISDN: "0000000004"
GNB_HOSTNAME: open5gs-gnb-2
GNB_HOSTNAME: open5gs-compose-gnb-2
IPERF_PORT: 5202

ue2-05:
<<: *ue_service
environment:
<<: *ue_env
MSISDN: "0000000005"
GNB_HOSTNAME: open5gs-gnb-3
GNB_HOSTNAME: open5gs-compose-gnb-3
IPERF_PORT: 5203

ue2-06:
<<: *ue_service
environment:
<<: *ue_env
MSISDN: "0000000006"
GNB_HOSTNAME: open5gs-gnb-4
GNB_HOSTNAME: open5gs-compose-gnb-4
IPERF_PORT: 5204

ue2-07:
<<: *ue_service
environment:
<<: *ue_env
MSISDN: "0000000007"
GNB_HOSTNAME: open5gs-gnb-5
GNB_HOSTNAME: open5gs-compose-gnb-5
IPERF_PORT: 5205

ue2-08:
<<: *ue_service
environment:
<<: *ue_env
MSISDN: "0000000008"
GNB_HOSTNAME: open5gs-gnb-6
GNB_HOSTNAME: open5gs-compose-gnb-6
IPERF_PORT: 5206

networks:
Expand Down
19 changes: 18 additions & 1 deletion docs/docs-ru_ru/deployments/open5gs-compose/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -25,15 +25,30 @@ docker network create \
--driver=bridge \
--subnet=172.20.0.0/24 \
--gateway=172.20.0.1 \
-o "com.docker.network.bridge.name"="br-open5gs-main" \
open5gs-main
sudo ethtool -K br-open5gs-main tx off
```

<details><summary> <i>Здесь мы отключаем tx offload чтобы не было TCP checksum error на внутренних пакетах, для тестов iperf.</summary>
<p>

Видимо дело в том, что по-умолчанию включен offloading расчета контрольных сумм и ядро до последнего откладывает вычисление csum в расчете на то, что csum посчитается в драйвере при отправке пакета. Но у нас виртуальное окружение и пакет в итоге улетает в туннель GTP на UPF. Видимо из-за этого не происходит корректного расчета csum.

При этом если отключить offloading, то контрольная сумма считается сразу же на iperf и всё работает.

</p>
</details>

<!---
# настройте правила firewall

`bash fw.sh`

--><br>
# запустите iperf-сервисы

`sudo apt install iperf3`

`for i in $(seq 5201 5208); do (iperf3 -s -p $i &) ; done`

# запустите Open5GS
Expand Down Expand Up @@ -77,3 +92,5 @@ docker network create \
# остановка и удаление всех контейнеров

`make clean`

`docker network rm open5gs-main`
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