Not an exciting topic, but you never can tell where this might show up ;->
R1----------R3------------------R4----------R7---------R8
|---tunnel--| ethernet serial serial
1FA.0010.7b7e.ebdf 8.8.8.8
no routing takes place between R1 and R3
R1 has a default route to R3
R3 advertises a default route to the tunnel interface address of R1
R1 relevant configuration:
ipx route default AFFA.0003.0003.0003
note that although the IPX default-network command has been entered, it does
not show up in the configuration output
R3 relevant configuration:
ipx route default AFFA.0001.0001.0001
!
ipx router rip
no network AFFA
!
note - to break routing between R1 and R3 I had to remove the tunnel
interface from the routing process.
R1 routing table:
S FFFFFFFE via AFFA.0003.0003.0003, Tu13
C 1FA (SAP), Et0
C 11AA (UNKNOWN), Lo1
C AFFA (TUNNEL), Tu13
R1#
note the default route. note there are no other IPX routes in the table. IPX
routing is not taking place. the default route points to the tunnel
interface address of R3.
R3 routing table:
S FFFFFFFE via AFFA.0001.0001.0001, Tu13
C 1FB (NOVELL-ETHER), Et0
C AFFA (TUNNEL), Tu13
R 7 [01/01] via 1FB.0000.0c8d.2257, 49s, Et0
R 8 [01/01] via 1FB.0000.0c8d.2257, 49s, Et0
R 47FF [02/01] via 1FB.0000.0c8d.2257, 49s, Et0
R 78FF [01/01] via 1FB.0000.0c8d.2257, 49s, Et0
R 8101 [01/01] via 1FB.0000.0c8d.2257, 49s, Et0
R 8102 [01/01] via 1FB.0000.0c8d.2257, 49s, Et0
R 8103 [01/01] via 1FB.0000.0c8d.2257, 49s, Et0
R 88888 [14/02] via 1FB.0000.0c8d.2257, 49s, Et0
R3#
note there are lots of IPX routes, but the default is to the tunnel
interface
R8 routing table:
E FFFFFFFE [270336000/3] via 78FF.0077.0077.0077, age 01:00:07,
1u, Se1
L 88888 is the internal network
C 8 (UNKNOWN), Lo104
C 78FF (HDLC), Se1
C 8101 (UNKNOWN), Lo101
C 8102 (UNKNOWN), Lo102
C 8103 (UNKNOWN), Lo103
E 7 [2297856/0] via 78FF.0077.0077.0077, age 01:00:57,
2u, Se1
E 1FB [2707456/0] via 78FF.0077.0077.0077, age 01:00:57,
1u, Se1
E 47FF [2681856/0] via 78FF.0077.0077.0077, age 01:00:57,
1u, Se1
E AFFA [270336000/2] via 78FF.0077.0077.0077, age 01:00:12,
1u, Se1
R8#
note the existence of the default route. not there are lots of routes in the
table.
Connectivity:
R8#ping 1FA.0010.7b7e.ebdf
Translating "1FA.0010.7b7e.ebdf"
Translating "1FA.0010.7b7e.ebdf"
Type escape sequence to abort.
Sending 5, 100-byte IPX Novell Echoes to 1FA.0010.7b7e.ebdf, timeout is 2
second
s:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 52/56/68 ms
R8#
note - able to ping an unknown network.
R1#ping
Protocol [ip]: ipx
Target IPX address: 8.8.8.8
Repeat count [5]:
Datagram size [100]:
Timeout in seconds [2]:
Verbose [n]:
Type escape sequence to abort.
Sending 5, 100-byte IPX Novell Echoes to 8.0008.0008.0008, timeout is 2
seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 52/54/56 ms
R1#
R1, with no routes other than the default route, can ping an unknown
network. ( extended ping, because the IPX network in question would be
interpreted as an IP address otherwise )
Some points of interest:
1) IPX default-route must be issued on every router where you want the
default route to be advertised. this does not show up in the running or
stored config.
2) while the default-route can be associate with a physical interface, one
can use an IPX network as well. that network cannot reside on the router
where the ipx route default command resides.
3) when constructing an IPX default route, one needs keep in mind the
requirements. It does not work at all like an IP default route.
My topology probably limits the usefulness of the IPX default route.
Hope this is of some use to some of you.
Chuck
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=35789&t=35789
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