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15-104 Configuring DHCP
20 Non-Local
Source
Routing
Host IP/
Boolean
(hex)
false Specifies whether a client will configure its IP layer to allow forwarding of
datagrams with non-local source routes.
Length: 1 octet
Values: 0=disable; 1=enable
21 Policy Filter Host IP/
Alternating
IP address/
mask
- Policy filters for non-local source routing, consisting of a list of IP addresses
and masks that specify destination/mask pairs with which to filter incoming
source routes. Any source-routed datagram whose next-hop address does not
match one of the filters should be discarded by the client.
Length: 8-octet minimum; multiples of 8
22 Maximum
Datagram
Reassem-
bly Size
Host IP/16-bit
hex integer
576 Peak size datagram a client will be ready to reassemble.
Length: 2 octets
Value: 576 minimum
23 Default IP
Time-to-
Live
Host IP/1 to
255 (hex),
rejects 0
64 Default TTL that a client will use on outgoing datagrams.
Length: 1 octet
Values: 1 to 255
24 Path MTU
Aging
Timeout
Host IP/32-bit
hex integer
- Timeout (in seconds) to use when aging Path MTU values discovered by the
mechanism (RFC-1191).
Length: 4-octets
25 Path MTU
Plateau
Table
Host IP/16-bit
hex integer
- Table of MTU sizes to use when performing Path MTU Discovery (RFC-1191).
It is ordered from smallest to largest.
Length: 2-octet minimum, multiples of 2
Value: 68 minimum
26 Interface
MTU
Interface/
16-bit hex
integer(s)
576 Maximum time to live on this interface.
Length: 2-octet minimum; multiples of 2
Value: 68 minimum
27 All Subnets
Are Local
Interface/
Boolean
(hex)
false Specifies if a client will assume all subnets of the IP network to which the client
is connected use the same MTU as the subnet of that network to which the
client is directly linked.
Length: 1 octet
Values: 1=all subnets share same MTU; 0=some directly-connected subnets
may have smaller MTUs
28 Broadcast
Address
Interface/
0.0.0.0,
255.255.255.
255, or
nonstandard
255.255.
255.255
Broadcast address in use on the client's subnet.
Length: 4 octets
29 Perform
Mask
Discovery
Interface/
Boolean
(hex)
false Specifies if a client will perform subnet mask discovery via ICMP.
Length: 1 octet
Values: 0=disable; 1=enable
30 Mask
Supplier
Interface/
Boolean
(hex)
false Specifies ifa client will respond to subnet mask requests via ICMP.
Length: 1 octet
Values: 0=do not respond; 1=respond
31 Perform
Router
Discovery
Interface/
Boolean
- Specifies if a client will solicit routers using Router Discovery mechanism
(RFC-1256).
Length: 1 octet
Values: 0=disable; 1=enable
Table 15-1 XSR-Supported DHCP Options (continued)
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Protocol
Name
Category/
Type
Default Description