H3C Technologies H3C S12500-X Series Switches - Manual (Page 25)

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To enable EVI flooding for all destination-unknown frames:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter EVI tunnel interface
view. interface tunnel number
[ mode evi ]
N/A
3. Enable EVI flooding. evi flooding enable By default, EVI flooding is disabled.
Enabling selective flooding for a MAC address
CAUTION:
Do not configure selective flooding for a unicast MAC address that might be learned at an edge
device's data plane. The configuration can cause packets destined for the MAC address to be dropped on
remote devices after they learn the MAC address through EVI IS-IS.
By default, the device floods unknown unicast and multicast frames only to internal interfaces.
If an application uses a special multicast address that requires flooding across sites and cannot be
added to a multicast forwarding table by IGMP snooping, enable selective flooding for the multicast
address.
To enable selective flooding for a MAC address:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter EVI tunnel interface view. interface tunnel number [ mode evi ] N/A
3. Enable selective flooding for
the MAC address in a set of
VLANs.
evi selective-flooding mac-address
mac-address vlan vlan-id-list By default, selective flooding is
disabled for all MAC addresses.
Enabling MAC address learning at the ingress
This feature is available in Release 11xx.
The device can learn the source MAC address of a packet when it receives the packet at the ingress or
when it sends out the packet at the egress.
For the device to correctly learn the source MAC address of a packet to be tunneled by EVI, you must
enable MAC address learning at the ingress. At the egress, the device learns the source MAC address
from the outer Ethernet header added after EVI encapsulation. The learned source MAC address is the
MAC address of the outgoing interface instead of the source MAC address in the inner Ethernet header.
To enable MAC address learning at the ingress:
Step Command Remarks
1. Enter system view. system-view N/A