Got it

Mpls mtu doesn't take effect

Created: Feb 20, 2020 14:38:49Latest reply: Feb 20, 2020 14:42:29 75 1 0 0
  Rewarded HiCoins: 0 (problem resolved)

Hello guys,

We found an interesting thing, a L3VPN with BGP as transport label distributing protocol and MP-BGP as service label distributing protocol.

the configuration as below:

 

Ingress PE interface configuration as below:

interfaceGigabitEthernet0/0/1.10

dot1q termination vid 10

ip binding vpn-instance te1

tcp adjust-mss 1300

ip address 10.1.12.1 255.255.255.252

 

Egress configuration as below:

interfaceGigabitEthernet0/0/1.20

dot1q termination vid 20

ip address 10.1.13.1 255.255.255.252

mpls

mpls mtu 1300

 

To ingress port of AR coming L3 MPLS packets packet with size of 1400, without DF bit.

1400 + 2 mpls labels is much bigger than mpls mtu (1300), then the packets should be fragmented, but in fact, the results indicates the outward packets with size 1408, which means the AR didn’t fragment the packets.

Do you guys ever encounter this problem ever before?

Thanks.


  • x
  • convention:

Featured Answers

Recommended answer

Admin Created Feb 20, 2020 14:42:29 Helpful(1) Helpful(1)

Hi @user_3534491
Currently AR doesn’t support set L3 MPLS MTU.
View more
  • x
  • convention:

All Answers
chenhui Admin Created Feb 20, 2020 14:42:29 Helpful(1) Helpful(1)

Hi @user_3534491
Currently AR doesn’t support set L3 MPLS MTU.
View more
  • x
  • convention:

Comment

Comment
You need to log in to comment to the post Login | Register

Notice Notice: To protect the legitimate rights and interests of you, the community, and third parties, do not release content that may bring legal risks to all parties, including but are not limited to the following:
  • Politically sensitive content
  • Content concerning pornography, gambling, and drug abuse
  • Content that may disclose or infringe upon others ' commercial secrets, intellectual properties, including trade marks, copyrights, and patents, and personal privacy
Do not share your account and password with others. All operations performed using your account will be regarded as your own actions and all consequences arising therefrom will be borne by you. For details, see " Privacy."
If the attachment button is not available, update the Adobe Flash Player to the latest version!

My Followers

Login and enjoy all the member benefits

Login

Huawei Enterprise Support Community
Huawei Enterprise Support Community
Block
Are you sure to block this user?
Users on your blacklist cannot comment on your post,cannot mention you, cannot send you private messages.