Using an H3C device as a PPPoE relay, the PPPoE client behind the device is unable to establish a connection with the server.
2023-12-29 09:54:03
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Network Topology
Problem Description
Our S5130S-10P-EI is used as a PPPoE relay, and the PPPoE client after the device cannot establish a connection with the server.
Process Analysis
1. Check that the device is configured correctly.
interface GigabitEthernet1/0/8
port access vlan 2
pppoe-relay trust
#
pppoe-relay enable
#
2. Capture of packets reveals that the device receives PADI packets but does not send any packets to the PPPoE Server.
3. It has been confirmed that the Trust interface has a different vlan from the client-side receive port, which requires the same vlan, and does not support crosslayer three.
Solution
Set the Trust interface port to the same vlan as the client-side receive port.