Implementing the Service Location Protocol
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Table 16-13
SLP Maximum Transmission Unit Values
SLP Multicast Radius:
This parameter specifies the maximum number of subnets (number of
routers plus 1) that SLP multicasts can travel across. A value of 1 prevents multicasting from
crossing any router. This is implemented in the Time To Live (TTL) setting of the UDP/TCP packet.
TTL is decremented by one of two conditions:
The packet crosses a router
The packet is buffered in a router for more than 1 second
Table 16-14
SLP Multicast Radius Values
Use Broadcast for SLP Multicast:
This parameter forces the SLP UA to use broadcast (all bits
turned on in the Host ID portion of the address) where it would have normally used multicast.
This has the following different behaviors from multicast:
Broadcast will not cross a router, so this limits the packet to the originating subnet.
It might cause additional bandwidth usage because the packet will now need to be repeated
from every switch port. Some switches are capable of tracking multicast registrations and that
forward a multicast packet only from the switch ports that are registered for that multicast
address.
Table 16-15
Use Broadcast for SLP Multicast Values
Use DHCP for SLP:
This parameter determines whether the SLP UA will attempt to locate a
DHCP server that can provide SLP Scope and DA configuration information. Even if the
workstation's IP address is statically configured, SLP can still receive an SLP Scope and DA
configuration from a DHCP server. The DHCP requests for SLP information are sent only as part of
the SLP UA/SA initialization. SLP information is requested using the DHCP INFORM request and
is sent in addition to the initial BOOTP Request (if the client is configured to obtain its IP address
via DHCP/BOOTP). All SLP DHCP response information is combined, then SLP contacts each DA
that has been configured by DHCP to determine the scopes supported by each DA.
Administrators who plan to never use DHCP to administer SLP information should set this
parameter to Off to reduce the minimal traffic the broadcast for a DHCP server will require.
Default Value
1,400 bytes
Valid Values
576 to 4,096 bytes
Default Value
32 hops
Valid Values
1 - 32 hops
Default Value
Off
Valid Values
On/Off
Summary of Contents for EDIRECTORY 8.8 SP5
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