H3C MSR 2600 Configuration Manual

Also see for MSR 2630: Command reference Installation, quick start Command reference Command reference Configuration guide

Contents

H3C MSR 2600 Configuration Manual Manual pdf 241 page image

226Figure 89 Trusted and untrusted portsH3C implementation of Option 18 and Option 37Option 18 for DHCPv6 snoopingOption 18, also called the interface-ID option, is used by the DHCPv6 relay agent to determine theinterface to use to forward RELAY-REPLY message.In H3C implementation, the DHCPv6 snooping device adds Option 18 to the received DHCPv6 requestmessage before forwarding it to the DHCPv6 server. The server then assigns IP address to the clientbased on the client information in Option 18.Figure 90 Option 18 formatFigure 90 shows the Option 18 fields:• Option code—Option code.• Option length—Size of the option data.• Port index—Port that receives the DHCPv6 request from the client.• VLAN ID—ID of the outer VLAN.• Second VLAN ID—ID of the inner VLAN.• DUID—DUID of the DHCPv6 client.