rdpd(1m) [hpux man page]
rdpd(1M) rdpd(1M) NAME
rdpd - router discovery protocol daemon (OBSOLETE) SYNOPSIS
| | DESCRIPTION
the router discover protocol daemon, implements the host portion of the router discovery protocol (see More specifically o solicits router advertisements when it is first started so as to populate the kernel table as soon as possible. o listens on all ethernet interfaces (that are up) for ICMP router advertisement datagrams. o adds a default router to the kernel table based on whether the router is a neighbor and has the highest preference among all advertisements received. o ages the default router entry applied to the kernel table based on the lifetime value found in the advertisement message. can be started during boot-time initialization. To do so, see (But see below.) Options supports the following options: Display the version of Enable tracing of the following events: o setting of expiration timer for advertised entry. o expiration of a router advertisement entry (only the active entry has a timer running). o add/update of an advertised router to the kernel. o removal from kernel table of an advertised router. o reception of a router advertisement from the link. o transmission of a router solicitation message. o failure while attempting to transmit a solicitation. Enable verbose tracing, which in addition to the above, traces: o contents of the router advertisement message received. o contents of rdpd internal statics which includes: 1. total number of messages received, 2. total number advertisements received, 3. total number of advertisements with invalid number of addresses field, 4. total number of advertisements with invalid address size field, 5. total number of advertisements with invalid message lengths, 6. total number of advertisements with invalid lifetime fields, 7. total number of messages with number of bytes received <> header length field. LIMITATIONS
1. The maximum number of default routes retained is 10. Only one of which is applied to the kernel routing tables (the one with the high- est preference). In the event that the advertised router with the highest preference expires the retained advertised router list will be searched for the highest preference, still current entry and that entry will be applied to the kernel table. This allows for quick recovery from aged advertisements. 2. only becomes aware of link state changes when either a new Router Advertisement message is received or a timer pops to age a currently active default router added by This may cause a delay between an interface state change (e.g., down) and any necessary change to the kernel routing table. 3. The "all hosts on subnet" broadcast address is used for sending solicitations instead of either the all-routers multicast or limited- broadcast IP addresses. 4. The limited-broadcast address for inbound Advertisements is assumed. 5. Default routers added via the command can be altered due to Router Advertisements for the same router. 6. Adding default routes via the command can cause unpredictable results and should be avoided. OBSOLESCENCE
The functionality of has been subsumed in See the statements described in gated.conf(4). has been obsoleted in HP-UX 11i Version 2. WARNINGS
should not be used if is enabled when running AUTHOR
was developed by HP. SEE ALSO
gated(1M), gated.conf(4). [1] Deering, S., "ICMP Router Discovery Messages", RFC 1256 rdpd(1M)
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in.rdisc(1M) System Administration Commands in.rdisc(1M) NAME
in.rdisc, rdisc - network router discovery daemon SYNOPSIS
/usr/sbin/in.rdisc [-a] [-f] [-s] [send-address] [receive-address] /usr/sbin/in.rdisc -r [-p preference] [-T interval] [send-address] [receive-address] DESCRIPTION
in.rdisc remains part of the software distribution of the Solaris Operating Environment. It is, however, not used by default. in.routed(1M) includes the functionality provided by in.rdisc. See routeadm(1M) for details of how to specify the IPV4 routing daemon. in.rdisc implements the ICMP router discovery protocol. The first form of the command is used on hosts and the second form is used on routers. in.rdisc can be invoked in either the first form (host mode) or second form (router mode). On a host, in.rdisc populates the network routing tables with default routes. On a router, advertises the router to all the hosts. Host (First Form) On a host, in.rdisc listens on the ALL_HOSTS (224.0.0.1) multicast address for ROUTER_ADVERTISE messages from routers. The received mes- sages are handled by first ignoring those listed router addresses with which the host does not share a network. Among the remaining addresses, the ones with the highest preference are selected as default routers and a default route is entered in the kernel routing table for each one of them. Optionally, in.rdisc can avoid waiting for routers to announce themselves by sending out a few ROUTER_SOLICITATION messages to the ALL_ROUTERS (224.0.0.2) multicast address when it is started. A timer is associated with each router address. The address will no longer be considered for inclusion in the routing tables if the timer expires before a new advertise message is received from the router. The address will also be excluded from consideration if the host receives an advertise message with the preference being maximally negative or with a lifetime of zero. Router (Second Form) When in.rdisc is started on a router, it uses the SIOCGIFCONF ioctl(2) to find the interfaces configured into the system and it starts lis- tening on the ALL_ROUTERS multicast address on all the interfaces that support multicast. It sends out advertise messages to the ALL_HOSTS multicast address advertising all its IP addresses. A few initial advertise messages are sent out during the first 30 seconds and after that it will transmit advertise messages approximately every 600 seconds. When in.rdisc receives a solicitation message, it sends an advertise message to the host that sent the solicitation message. When in.rdisc is terminated by a signal, it sends out an advertise message with the preference being maximally negative. OPTIONS
-a Accept all routers independent of the preference they have in their advertise messages. Normally, in.rdisc only accepts (and enters in the kernel routing tables) the router or routers with the highest preference. -f Run in.rdisc forever even if no routers are found. Normally, in.rdisc gives up if it has not received any advertise message after soliciting three times, in which case it exits with a non-zero exit code. If -f is not specified in the first form then -s must be specified. -r Act as a router, rather than a host. -s Send three solicitation messages initially to quickly discover the routers when the system is booted. When -s is specified, in.rdisc exits with a non-zero exit code if it can not find any routers. This can be overridden with the -f option. -p preference Set the preference transmitted in the solicitation messages. The default is zero. -T interval Set the interval between transmitting the advertise messages. The default time is 600 seconds. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWroute | +-----------------------------+-----------------------------+ SEE ALSO
in.routed(1M), routeadm(1M), ioctl(2), gateways(4), attributes(5), icmp(7P), inet(7P) Deering, S.E., editor, ICMP Router Discovery Messages, RFC 1256, Network Information Center, SRI International, Menlo Park, California, September 1991. SunOS 5.10 5 Nov 2004 in.rdisc(1M)