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S5732 dhcp snooping in vp...

S5732 dhcp snooping in vpls vsi and uplink (mpls) port is routed

Created: Sep 2, 2021 21:48:26Latest reply: Sep 3, 2021 11:59:19 326 8 0 0 0
  Rewarded HiCoins： 0 (problem resolved)
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I have setup on PE switch, where I have L3 uplink, and I want to configure dhcp snooping on vlan binded to vpls vsi.

But my uplink is L3 port and I can't have a chance to change this to L2 port (few other L3 subinterfaces). 

How do I can do this? it is any possibility to made dhcp snooping working in vpls VLAN ?

When I add `dhcp snooping over-vpls enable` in global config, without defining trusted interface, dhcp on the PC station connected to the g0/0/3, stop working.


vsi vpls-lan auto

 pwsignal bgp

  route-distinguisher 103:xxxx

  vpn-target 999:xxx import-extcommunity

  vpn-target 999:xxx export-extcommunity

  site 3 range 10 default-offset 0

#

vlan 800

 description guest/lan

 dhcp snooping enable

 dhcp snooping check dhcp-request enable

 dhcp snooping check dhcp-rate enable

#

interface Eth-TrunkX

 undo portswitch

 ip address 10.1.1.1 255.255.255.0

 ospf smart-discover

 mpls

 mpls ldp

 mode lacp

#

interface GigabitEthernet0/0/3

 port link-type access

 port default vlan 800

 stp bpdu-filter enable

 stp edged-port enable

 dhcp snooping enable

#

interface Vlanif800

 l2 binding vsi vpls-lan

#


S5700EIVPLSDHCP snooping

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chenhui
Admin Created Sep 3, 2021 11:59:19

Posted by bul at 2021-09-03 10:00 but then, I build dhcp snooping table only on CE switch, and I cannot use this table on PE1 or PE2 ...
No, I think you should configure the DHCP trust port on the PE2, which connects to the CE switch.
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user_3729046
user_3729046 Admin Created Sep 2, 2021 21:48:42

Hello User. We are reviewing your question and we will answer you shortly. Thanks.
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DDSN
DDSN Admin Created Sep 3, 2021 02:17:58

Hi bul,
Can you upload your network topology?

Or you can refer to the following example: https://support.huawei.com/hedex/hdx.do?docid=EDOC1100126530&id=EN-US_TASK_0176367462&lang=en


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PanchakS
PanchakS Created Sep 3, 2021 03:59:59

S5732 dhcp snooping in vpls vsi and uplink (mpls) port is routed-4117935-1
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Unicef
Unicef MVE Created Sep 3, 2021 09:20:51

S5732 dhcp snooping in vpls vsi and uplink (mpls) port is routed-4118329-1
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bul
bul Created Sep 3, 2021 09:23:58

Posted by DDSN at 2021-09-03 02:17 Hi bul,Can you upload your network topology?Or you can refer to the following example: https://supp ...

vpls and L3 uplink

dhcp client connected directly to the PE switch
PE are connected to P switches trough L3 uplinks (it is not possible to add dhcp snooping trust on L3 links)
Between PE1 and PE2 I have vpls connection

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DDSN
DDSN Admin Created Sep 3, 2021 09:51:16

Hi bul,
The trusted port should be the port connecting the CE to the DHCP server, not the port connecting PE1 to the PE.
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bul
bul Created Sep 3, 2021 10:00:32

Posted by DDSN at 2021-09-03 09:51 Hi bul,The trusted port should be the port connecting the CE to the DHCP server, not the port connec ...
but then, I build dhcp snooping table only on CE switch, and I cannot use this table on PE1 or PE2.
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  • x
  • convention：
(0) (0)
9#
chenhui
chenhui Admin Created Sep 3, 2021 11:59:19

Posted by bul at 2021-09-03 10:00 but then, I build dhcp snooping table only on CE switch, and I cannot use this table on PE1 or PE2 ...
No, I think you should configure the DHCP trust port on the PE2, which connects to the CE switch.
View more
  • x
  • convention：
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