HP VPN Firewall Appliances Network Management Configuration Guide
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forwarding. A multicast forwarding boundary sets the boundary condition for the IPv6 multicast groups
in the specified range or scope. If the destination address of an IPv6 multicast packet matches the set
boundary condition, the packet will not be forwarded. Once an IPv6 multicast boundary is configured
on an interface, this interface can no longer forward IPv6 multicast packets (including those sent from the
local device) or receive IPv6 multicast packets.
To configure an IPv6 multicast forwarding range:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type interface-number N/A
3. Configure an IPv6 multicast
forwarding boundary.
multicast ipv6 boundary { ipv6-group-address
prefix-length | scope { scope-id | admin-local |
global | organization-local | site-local } }
No forwarding
boundary by default.
Configuring the IPv6 multicast forwarding table size
The router maintains the corresponding forwarding entry for each IPv6 multicast packet that it receives.
Excessive IPv6 multicast routing entries, however, can exhaust the router's memory and cause lower
performance. You can set an upper limit on the number of entries in the IPv6 multicast forwarding table
based on the actual networking situation and the performance requirements. If the configured upper limit
is smaller than the number of existing entries in the IPv6 multicast forwarding table, the entries in excess
are not deleted immediately. The IPv6 multicast routing protocol that runs on the router will delete them.
The router will no longer install new IPv6 multicast forwarding entries until the number of existing IPv6
multicast forwarding entries decreases below the upper limit.
When the router forwards IPv6 multicast data, it replicates a copy of the IPv6 multicast data for each
downstream node and forwards the data. Each of these downstream nodes is a branch of the IPv6
multicast distribution tree. You can configure the maximum number of downstream nodes (namely, the
maximum number of outgoing interfaces) for a single entry in the IPv6 multicast forwarding table to
lessen the burden on the router for replicating IPv6 multicast traffic. If the configured upper limit is smaller
than the number of existing downstream nodes for a forwarding entry, the downstream nodes in excess
are not deleted immediately. The IPv6 multicast routing protocol will delete them. The router will no
longer update the newly added downstream nodes for the forwarding entry until the number of existing
downstream nodes for the entry decreases below the upper limit.
To configure the IPv6 multicast forwarding table size:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Configure the maximum number of
entries in the IPv6 multicast
forwarding table.
multicast ipv6 forwarding-table
route-limit limit
Optional.
The default is 4096.
3. Configure the maximum number of
downstream nodes for a single IPv6
multicast forwarding entry.
multicast ipv6 forwarding-table
downstream-limit limit
Optional.
The default is 128.