IP Addressing
through DHCP that corresponds to a real address from one of the SMS2000’s DHCP pools.
Note: Addresses in the DHCP pool must be in the same subnet as the SMS2000 or in a
For example,
sms2000% group add dhcpers
sms2000%
sms2000% set rule bob 1 mac=00:01:02:03:04:05
Static Non-Routable Addresses
A fixed address can be assigned to a subscriber. Static
Table 11-1 Static Non-routable Addresses
Address Policy | NAT? | Gets Consistent | Policy can be | Policy can be |
|
| IP Address? | sent via | sent via OCS? |
|
|
| RADIUS? |
|
Yes | No | No | Yes | |
Static | No | Yes | No | Yes |
DHCP Pools | No | Yes | No | Yes |
Fixed | No | Yes | Yes | Yes |
1to1 | Yes | No | No | No |
1to1 Unique | Yes | No | No | No |
IP Multicasting
Ethernet multicast packets are translated by the SMS2000 before being sent to the subscriber ports. The SMS2000 snoops IGMP between a multicast querier, such as a multicast router or a content server, and hosts. The SMS2000 translates Ethernet multicast MAC addresses to unicast MAC addresses; multicast packets received on the network side of the SMS2000 are translated to unicast traffic on the subscriber side. Only clients participating in IGMP receive multicast content.
A querier, such as a full feature multicast router or a content server, sends IGMP queries on its local network. The SMS2000 forwards these queries (which are Ethernet broadcasts) to each of the subscribers. If the subscribers are on VLAN switches, the SMS2000 sends the query as a broadcast to each of the active VLANs. By snooping the response from subscribers, the SMS2000 tracks whether each individual client is requesting a multicast stream. If a subscriber fails to respond to three consecutive queries for a particular multicast group or if the subscriber sends an IGMP“leave,” the SMS2000 stops sending the multicast content.
TUT Systems, Inc | Page 71 of 104 | P/N |
