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How to Log Actions of the IPv4 Routing
Daemon
If you suspect a malfunction of routed, the IPv4 routing daemon, you can start a log that traces the daemon's activity. The log includes all packet transfers when you start the routed daemon.
On the local host, assume the Primary Administrator role, or become superuser.
The Primary Administrator role includes the Primary Administrator profile. To create the role and assign the role to a user, see Chapter 2, "Working With the Solaris Management Console (Tasks)," in System Administration Guide: Basic Administration.
Create a log file of routing daemon actions:
# /usr/sbin/in.routed /var/log-file-name
Caution - On a busy network, this command can generate almost continuous
output.
Example 8-15 Network Log for the in.routed Daemon
The following example shows the beginning of the log that is created by the procedure How to Log Actions of the IPv4 Routing Daemon.
-- 2003/11/18 16:47:00.000000 --
Tracing actions started
RCVBUF=61440
Add interface lo0 #1 127.0.0.1 -->127.0.0.1/32
<UP|LOOPBACK|RUNNING|MULTICAST|IPv4> <PASSIVE>
Add interface hme0 #2 10.10.48.112 -->10.10.48.0/25
<UP|BROADCAST|RUNNING|MULTICAST|IPv4>
turn on RIP
Add 10.0.0.0 -->10.10.48.112 metric=0 hme0 <NET_SYN>
Add 10.10.48.85/25 -->10.10.48.112 metric=0 hme0 <IF|NOPROP>
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How to Trace the Activities of the IPv6
Neighbor Discovery Daemon
If you suspect a malfunction of the IPv6 in.ndpd daemon, you can start a log that traces the daemon's activity. This trace is displayed on the standard output until terminated. This trace includes all packet transfers when you start the in.ndpd daemon.
Assume the Primary Administrator role, or become superuser, on the local IPv6 node.
The Primary Administrator role includes the Primary Administrator profile. To create the role and assign the role to a user, see Chapter 2, "Working With the Solaris Management Console (Tasks)," in System Administration Guide: Basic Administration.
Start a trace of the in.ndpd daemon.
# /usr/lib/inet/in.ndpd -t
Terminate the trace as needed by typing Control-C.
Example 8-16 Trace of the in.ndpd Daemon
The following output shows the beginning of a trace of in.ndpd.
# /usr/lib/inet/in.ndpd -t Nov 18 17:27:28 Sending solicitation to ff02::2 (16 bytes) on hme0 Nov 18 17:27:28 Source LLA: len 6 <08:00:20:b9:4c:54> Nov 18 17:27:28 Received valid advert from fe80::a00:20ff:fee9:2d27 (88 bytes) on hme0 Nov 18 17:27:28 Max hop limit: 0 Nov 18 17:27:28 Managed address configuration: Not set Nov 18 17:27:28 Other configuration flag: Not set Nov 18 17:27:28 Router lifetime: 1800 Nov 18 17:27:28 Reachable timer: 0 Nov 18 17:27:28 Reachable retrans timer: 0 Nov 18 17:27:28 Source LLA: len 6 <08:00:20:e9:2d:27> Nov 18 17:27:28 Prefix: 2001:08db:3c4d:1::/64 Nov 18 17:27:28 On link flag:Set Nov 18 17:27:28 Auto addrconf flag:Set Nov 18 17:27:28 Valid time: 2592000 Nov 18 17:27:28 Preferred time: 604800 Nov 18 17:27:28 Prefix: 2002:0a00:3010:2::/64 Nov 18 17:27:28 On link flag:Set Nov 18 17:27:28 Auto addrconf flag:Set Nov 18 17:27:28 Valid time: 2592000 Nov 18 17:27:28 Preferred time: 604800 |
Displaying Routing Information With the traceroute Command
The traceroute command traces the route an IP packet follows to a remote system. For technical details about traceroute, see the traceroute(1M) man page.
You use the traceroute command to uncover any routing misconfiguration and routing path failures. If a particular host is unreachable, you can use traceroute to see what path the packet follows to the remote host and where possible failures might occur.
The traceroute command also displays the round trip time for each gateway along the path to the target host. This information can be useful for analyzing where traffic is slow between the two hosts.
How to Find Out the Route to a Remote
Host
Type the following to discover the route to a remote system:
% traceroute destination-hostname
You can run this form of the traceroute command from your user account.
Example 8-17 Using the traceroute Command to Show the Route to a Remote Host
The following output from the traceroute command shows the seven-hop path a packet follows from the local system nearhost to the remote system farhost. The output also shows the times for a packet to traverse each hop.
istanbul% traceroute farhost.faraway.com traceroute to farhost.faraway.com (172.16.64.39), 30 hops max, 40 byte packets 1 frbldg7c-86 (172.16.86.1) 1.516 ms 1.283 ms 1.362 ms 2 bldg1a-001 (172.16.1.211) 2.277 ms 1.773 ms 2.186 ms 3 bldg4-bldg1 (172.16.4.42) 1.978 ms 1.986 ms 13.996 ms 4 bldg6-bldg4 (172.16.4.49) 2.655 ms 3.042 ms 2.344 ms 5 ferbldg11a-001 (172.16.1.236) 2.636 ms 3.432 ms 3.830 ms 6 frbldg12b-153 (172.16.153.72) 3.452 ms 3.146 ms 2.962 ms 7 sanfrancisco (172.16.64.39) 3.430 ms 3.312 ms 3.451 ms |
How to Trace All Routes
This procedure uses the -a option of the traceroute command to trace all routes.
Type the following command on the local system:
% traceroute -ahost-name
You can run this form of the traceroute command from your user account.
Example 8-18 Tracing All Routes to a Dual-Stack Host
This example shows all possible routes to a dual-stack host.
% traceroute -a v6host.remote.com traceroute: Warning: Multiple interfaces found; using 2::56:a0:a8 @ eri0:2 traceroute to v6host (2001:db8:4a3b::102:a00:fe79:19b0),30 hops max, 60 byte packets 1 v6-rout86 (2001:db8:4a3b:56:a00:fe1f:59a1) 35.534 ms 56.998 ms * 2 2001:db8::255:0:c0a8:717 32.659 ms 39.444 ms * 3 farhost.faraway.COM (2001:db8:4a3b::103:a00:fe9a:ce7b) 401.518 ms 7.143 ms * 4 distant.remote.com (2001:db8:4a3b::100:a00:fe7c:cf35) 113.034 ms 7.949 ms * 5 v6host (2001:db8:4a3b::102:a00:fe79:19b0) 66.111 ms * 36.965 ms traceroute to v6host.remote.com (192.168.10.75),30 hops max,40 byte packets 1 v6-rout86 (172.16.86.1) 4.360 ms 3.452 ms 3.479 ms 2 flrmpj17u.here.COM (172.16.17.131) 4.062 ms 3.848 ms 3.505 ms 3 farhost.farway.com (10.0.0.23) 4.773 ms * 4.294 ms 4 distant.remote.com (192.168.10.104) 5.128 ms 5.362 ms * 5 v6host (192.168.15.85) 7.298 ms 5.444 ms * |