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MPLS forwarding

MPLS forwarding

Created: Oct 14, 2019 08:38:00Latest reply: Nov 30, 2019 06:27:52 552 5 0 0 0
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‍‍In a MP-BGP MPLS L3VPN network, what if multi PE routers connect to a P router, and PHP feature is enabled on the P router, as we all know, the outter MPLS label will be poped out and then forwarded to the PE router. ‍‍‍‍

What I am curiousty about is how does the P router determine to forward the packet without the outter label.‍‍


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chenhui
Admin Created Oct 14, 2019 08:38:21

Hello, you made a mistake in understanding the forwarding behavior.
In your description, the P router forwards the packets after poping out the outter label. Actually, this process determined before the outter label poping out. In other words, the P router decides the destination PE router before poping out the outter label.
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chenhui
chenhui Admin Created Oct 14, 2019 08:38:21

Hello, you made a mistake in understanding the forwarding behavior.
In your description, the P router forwards the packets after poping out the outter label. Actually, this process determined before the outter label poping out. In other words, the P router decides the destination PE router before poping out the outter label.
View more
  • x
  • convention：
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wissal
wissal MVE Created Oct 15, 2019 17:55:36

Hello,
Please refer to the link below to find the answer for your question.
https://forum.huawei.com/enterprise/en/approaching-ne-14-a-packet-s-adventures-on-huawei-routers-mpls-forwarding-1/thread/224307-863
Thanks
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user_3445655
user_3445655 Created Nov 30, 2019 06:27:44

Posted by wissal at 2019-10-15 17:55 Hello,Please refer to the link below to find the answer for your question.https://forum.huawei.com/e ...
Thanks for you support.
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wissal
wissal Created Nov 30, 2019 06:31:59 (0) (0)
You are welcome  
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user_3445655
user_3445655 Created Nov 30, 2019 06:27:52

Posted by chenhui at 2019-10-14 08:38 Hello, you made a mistake in understanding the forwarding behavior.In your description, the P router ...
thanks for you support
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