H3C S7500 Series Ethernet Switches Command Manual

Table Of Contents
Command Manual – Routing Protocol
H3C S7500 Series Ethernet Switches Chapter 3 OSPF Configuration Commands
3-47
Examples
# Specify the priority of an imported external route of the AS as 160.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] ospf 1
[H3C-ospf-1] preference ase 160
3.1.44 protocol multicast-mac enable
Syntax
protocol multicast-mac enable
undo protocol multicast-mac enable
View
System view
Parameters
None
Description
Use the protocol multicast-mac enable command to enable the sending of protocol
multicast MAC addresses.
Use the undo protocol multicast-mac enable command to disable the sending of
protocol multicast MAC addresses.
By default, protocol multicast MAC address sending is enabled.
If OSPF is configured when Layer-2/Layer-3 multicast function is enabled, the system
will multicast the broadcast routing protocol packets because the broadcast MAC
address and multicast MAC address used by OSPF are the same. This makes
broadcast packets unable to reach the destination host and adversely affects the
operation of the routing protocol.
You can disable the protocol multicast MAC address sending function so that the
system correctly forwards OSPF multicast packets, thus ensuring the normal operation
of the routing protocol.