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docs: update OVN L3 HA BFD static route documentation to clarify BFD … #404

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docs: update OVN L3 HA BFD static route documentation to clarify BFD … #404

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25 changes: 1 addition & 24 deletions docs/vpc/ovn-l3-ha-based-ecmp-with-bfd.en.md
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Original file line number Diff line number Diff line change
Expand Up @@ -77,7 +77,7 @@ spec:
- vpc1
enableExternal: true
enableBfd: true # bfd switch can be switched at will
#enableBfd: false
#enableBfd: false


# cat 02-subnet.yml
Expand Down Expand Up @@ -243,29 +243,6 @@ PING 223.5.5.5 (223.5.5.5) 56(84) bytes of data.
catch outgoing packets within the ovnext ns of a gateway node

```bash
# tcpdump -i ovnext0 host 223.5.5.5 -netvv
dropped privs to tcpdump
tcpdump: listening on ovnext0, link-type EN10MB (Ethernet), capture size 262144 bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel
[root@pc-node-1 ~]# exit
[root@pc-node-1 ~]# ssh pc-node-2
Last login: Thu Feb 23 09:21:08 2023 from 10.5.32.51
[root@pc-node-2 ~]# ip netns exec ovnext bash
[root@pc-node-2 ~]# tcpdump -i ovnext0 host 223.5.5.5 -netvv
dropped privs to tcpdump
tcpdump: listening on ovnext0, link-type EN10MB (Ethernet), capture size 262144 bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel
[root@pc-node-2 ~]# exit
[root@pc-node-2 ~]# logout
Connection to pc-node-2 closed.
[root@pc-node-1 ~]# ssh pc-node-3
Last login: Thu Feb 23 08:32:41 2023 from 10.5.32.51
[root@pc-node-3 ~]# ip netns exec ovnext bash
[root@pc-node-3 ~]# tcpdump -i ovnext0 host 223.5.5.5 -netvv
dropped privs to tcpdump
Expand Down
33 changes: 1 addition & 32 deletions docs/vpc/ovn-l3-ha-based-ecmp-with-bfd.md
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Original file line number Diff line number Diff line change
Expand Up @@ -74,7 +74,7 @@ spec:
- vpc1
enableExternal: true
enableBfd: true # bfd 开关可以随意切换，开表示启用 bfd ecmp 路由
#enableBfd: false
#enableBfd: false


# cat 02-subnet.yml
Expand Down Expand Up @@ -120,7 +120,6 @@ vpc1 true true true ["vpc1-subnet1"]
# 默认 vpc 未支持 ENABLEBFD
# 自定义 vpc 已支持且已启用


# 1. 创建了 bfd 会话
# k ko nbctl list bfd
_uuid : be7df545-2c4c-4751-878f-b3507987f050
Expand Down Expand Up @@ -199,10 +198,6 @@ route_table : ""

``` bash
# 同时在网关节点都应该具备以下资源

[root@pc-node-1 ~]# ip netns exec ovnext bash ip a
/usr/sbin/ip: /usr/sbin/ip: cannot execute binary file
[root@pc-node-1 ~]#
[root@pc-node-1 ~]# ip netns exec ovnext ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
Expand All @@ -224,15 +219,12 @@ Destination Gateway Genmask Flags Metric Ref Use Iface
10.5.204.0 0.0.0.0 255.255.255.0 U 0 0 0 ovnext0

## 注意以上内容和一个 internal port unerlay 公网 pod 内部的 ns 大致是一致的，这里只是在网关节点上单独维护了一个 ns

[root@pc-node-1 ~]# ip netns exec ovnext bfdd-control status
There are 1 sessions:
Session 1
id=1 local=10.5.204.108 (p) remote=10.5.204.122 state=Up

## 这里即是 lrp bfd 会话的另一端，也是 lrp ecmp 的下一跳的其中一个


[root@pc-node-1 ~]# ip netns exec ovnext ping -c1 223.5.5.5
PING 223.5.5.5 (223.5.5.5) 56(84) bytes of data.
64 bytes from 223.5.5.5: icmp_seq=1 ttl=115 time=21.6 ms
Expand All @@ -243,29 +235,6 @@ PING 223.5.5.5 (223.5.5.5) 56(84) bytes of data.
可以在某一个网关节点的 ovnext ns 内抓到出去的包

```bash
# tcpdump -i ovnext0 host 223.5.5.5 -netvv
dropped privs to tcpdump
tcpdump: listening on ovnext0, link-type EN10MB (Ethernet), capture size 262144 bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel
[root@pc-node-1 ~]# exit
[root@pc-node-1 ~]# ssh pc-node-2
Last login: Thu Feb 23 09:21:08 2023 from 10.5.32.51
[root@pc-node-2 ~]# ip netns exec ovnext bash
[root@pc-node-2 ~]# tcpdump -i ovnext0 host 223.5.5.5 -netvv
dropped privs to tcpdump
tcpdump: listening on ovnext0, link-type EN10MB (Ethernet), capture size 262144 bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel
[root@pc-node-2 ~]# exit
[root@pc-node-2 ~]# logout
Connection to pc-node-2 closed.
[root@pc-node-1 ~]# ssh pc-node-3
Last login: Thu Feb 23 08:32:41 2023 from 10.5.32.51
[root@pc-node-3 ~]# ip netns exec ovnext bash
[root@pc-node-3 ~]# tcpdump -i ovnext0 host 223.5.5.5 -netvv
dropped privs to tcpdump
Expand Down