Why Deploy a SLP DA?
The primary reason to deploy DAs is to reduce the amount of multicast traffic and the delays that are associated with gathering unicast replies. In a large network with many UAs and SAs, the amount of multicast traffic that is involved in service discovery can become so large that network performance degrades. By deploying one or more DAs, UAs must unicast to DAs for service and SAs must register with DAs by using unicast. The only SLP-registered multicast in a network with DAs is for active and passive DA discovery. SAs register automatically with any DAs they discover within a set of common scopes, rather than accepting multicast service requests. Multicast requests in scopes that are not supported by the DA are still answered directly by the SA, however. Service requests from UAs are unicast to DAs rather than multicast onto the network when a DA is deployed within the UA’s scopes. Consequently, DAs within the UA’s scopes reduce multicast. By eliminating multicast for normal UA requ
