安装KVM组件

此步骤略，具体信息可以自行查阅

通过Virsh管理KVM

[root@host] $ virsh list
 Id    Name                           State
----------------------------------------------------

[root@host] $ virsh list --all
 Id    Name                           State
----------------------------------------------------
 -     centos-test                    shut off

[root@host] $
[root@host] $ brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.b8599f1ef79e       no              eth2
virbr0          8000.5254004de69f       yes             virbr0-nic
[root@host] $
[root@host] $ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         172.16.211.1    0.0.0.0         UG    0      0        0 br0
169.254.0.0     0.0.0.0         255.255.0.0     U     1007   0        0 br0
172.16.211.0    0.0.0.0         255.255.255.0   U     0      0        0 br0
192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0

In the article, only show as follow (because easy to show how to work):

Protocol: UDP; Port: 5234

Encoding: KV-GPB

For more detailed information, you can reference my colleague’s GitHub, which includes more examples, e.g GRPC.

AlexFengCisco / Telemetry_Receiver

GRPC Update Info:

If use GRPC not TCP/UDP, that will have standard function, you will not need to write “DECODE_FN_MAP…”, function will auto generate, direct to use. Simple list steps:

1. Get GRPC protobuf (e.g “mdt_grpc_dialout”) from cisco / bigmuddy-network-telemetry-proto
2. Install/use compile tools, suggest install python virtual env, you can reference 在MacOS中部署Python虚拟开发环境

(telemetry-protocol) [root@telemetry telemetry-protocol]# python -V
Python 3.6.8
(telemetry-protocol) [root@telemetry telemetry-protocol]# easy_install pip
(telemetry-protocol) [root@telemetry telemetry-protocol]# pip install grpcio
(telemetry-protocol) [root@telemetry telemetry-protocol]# pip install protobuf
(telemetry-protocol) [root@telemetry telemetry-protocol]# pip install grpcio_tools
(telemetry-protocol) [root@telemetry telemetry-protocol]# python -m grpc_tools.protoc -I. --python_out=. --grpc_python_out=. cisco_grpc_dialout.proto
(telemetry-protocol) [root@telemetry telemetry-protocol]# ls -l|grep cisco
-rw-r--r--.  1 root    root       2695 Aug 10 16:16 cisco_grpc_dialout_pb2_grpc.py   #generated
-rw-r--r--.  1 root    root       3805 Aug 10 16:16 cisco_grpc_dialout_pb2.py   #generated
-rw-r--r--.  1 root    root        485 Aug 10 16:15 cisco_grpc_dialout.proto   #proto file  

Follow all file if you need grpc protocol:

[root@telemetry grpc-dailout]# ls -l
total 36
-rw-r--r--. 1 root root  2695 Aug 10 16:16 cisco_grpc_dialout_pb2_grpc.py #Contains the server Stub class and the client Stub class, as well as the service RPC interface to be implemented.
-rw-r--r--. 1 root root  3805 Aug 10 16:16 cisco_grpc_dialout_pb2.py #message serialization classes
-rw-r--r--. 1 root root   484 Aug 10 15:36 mdt_grpc_dialout.proto 
-rw-r--r--. 1 root root  3722 Aug 10 16:11 service_grpc_dialout_no_tls.py #service python
-rw-r--r--. 1 root root 19220 Aug 10 15:58 telemetry_pb2.py  #decode gpb-kv messages, generate as below

grpc-dailout.zip

Install Protobuf of python version

完整阅读

The Linux come from by my compiled kernel that supports uSID, please check my last blog: Compile SRv6 uSID and VPP on ubuntu 20.04

Before doing SRv6 lab, please double confirm enable the function by following cmd:

sysctl -w net.ipv6.conf.all.forwarding=1
sysctl -w net.ipv4.conf.all.forwarding=1
sysctl -w net.ipv6.conf.all.seg6_enabled=1

Check by following cmd:

root@vm1:/home/cisco# sysctl -a |grep net.ipv6.conf.all.forwarding
net.ipv6.conf.all.forwarding = 1

Above cmd will disappear after reboot, you can permanently write to “/etc/sysctl.conf”.

Btw, how to config srv6 and usid, reference follows:

SRv6 uSID Linux Iproute2

SRv6 – Linux Kernel Implementation

Topology

完整阅读

PS: Compile Server base on “focal-server-cloudimg-amd64.vmdk”, 20200706 update.

General Config on ubuntu

Config port by new “ip” cmd, and DNS

root@server-test:/opt# ip addr add 10.75.37.59/24 dev ens4
# config addr for one port 
root@server-test:/opt# ip addr del 172.16.1.163/24 dev ens3
# delet addr for one port
root@server-test:/opt# ip addr
# equal with ifconfig
root@server-test:/opt# ip link set ens4 up
# up one port 
root@server-test:/opt# ip -s link ls ens4
# cool cmd, check RX/TX packets, errors, dropped, overrun, mcast
root@server-test:/opt# ip route add default via 10.75.37.1 
# config default route
root@server-test:/opt# ip route
# check v4 route table
root@server-test:/opt# ip -6 route
# check v6 route table
root@server-test:/opt# echo 'nameserver 64.104.123.144' > /etc/resolv.conf

完整阅读

PS：视频在油管上，需要搭梯子……

Summary intros session, and there are two separate demo sessions to deep dive, as follow:

完整阅读