GRE的工作原理VPN隧道|计算机网络|第1部分
您是否曾经想过“ GRE隧道如何工作？”“我如何加密GRE”“提高GRE稳定性的最佳实践是什么？”如果您对上述任何一个问题的回答是肯定的，那么本系列适合您！
#GRE（通用路由封装）隧道是网络工程师可以使用的最通用的工具之一。
它们是#VPN，可用于通过Internet进行隧道传输，创建虚拟站点以访问WAN，绕过网络，运行OSPF，EIGRP和BGP等路由协议，避免RIP跳数问题，迁移到IPv6并连接到DDoS洗涤器。
一对路由器将在VTI（虚拟隧道接口）之间建立隧道。这通过称为底层网络的网络。底衬对于通过隧道的流量透明。隧道是覆盖网络。
GRE在原始数据包中添加了额外的标头。这使原始数据包保持原样，而封装的数据包则穿过底层。记住要当心MTU和MSS！
在实验室自己尝试一下！
GRE隧道系列
第1部分：GRE的工作原理-当数据包从网络的一侧移动到另一侧时，请参见封装过程-https://youtu.be/ytAqv7qHGyU
第2部分：使用IPSec进行GRE加密-默认情况下，不对GRE加密！了解IPSec的基础知识，以及如何在GRE隧道中使用它-2018年9月7日
第3部分：提高GRE稳定性-需要注意一些陷阱，包括递归路由。了解一些可用于使隧道稳定的最佳实践–即将于2018年9月21日发布
感谢您收看网络指导！订阅以下内容，一定不要错过GRE隧道系列的第2部分和第3部分：https://goo.gl/Z9bk72
有关更多信息，请查看https://networkdirection.net/GRE+Tunnels
该视频对于#Cisco #CCNA和#CCNP认证很有用
请务必查看我们的其他网络视频：
VxLAN系列：https：//goo.gl/RjDuya
网络指导官方播放列表：https：//goo.gl/QGikwC
联络我们
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Does ip mtu 1476 and ip tcp adjust-mss 1436 is really important ? What if it not be used in tunnel configuration ?
I cannot understand where is role of VTI (192.168.1.1 and 192.168.2.1) in that transmission? This video explains just typical IPv4 communication between 2 endpoints – GRE field in packet is not explained
Wow very nicely explained
Thanks for creating and sharing with us!! Perfect explanation for us that are new to GRE!!! Cheers!
Awesome video, thanks!
Nicely done!
Thank u man…..
5:28 you said 1436 when I think you meant to say 1476
best explained !!!
Great Explanation.. Thanks.
great explanation!
Thanks for this well-explained nuggets 🙂
very nice explanation – may be a LAB would have been an icing on the cake
Thank you, very clear and easy to understand. Please continue to make videos like this – highly appreciate it.
Finally some quality tutorials, great work!
Thanks. Plz emphasis more on vpn vs gre application, similarity and differences
Read more here: https://networkdirection.net/GRE+Tunnels
Try the lab here: https://networkdirection.net/labsandquizzes/labs/lab-gre-tunnels/
There is a mistake with address on topology and set for tunnel src/dst addr. 20.20.20.20 and 10.20.20.20.
Anyway, great series 🙂 thx for that.
This was fantastic, looking forward the the encryption component,
Another great explaination!
Thank you. Great explanation as always. Will you cover the IPSec tunnel in this series?
It is so weird how perfectly timed these videos are coming out to my studying. When I was looking into learning VRF's you released an excellent video series on VRF's. Now when I want to brush up on VPN's you release this video at the perfect time. Keep up the awesome work! Hopefully the next series will be MPLS.