Multicast addresses are SUPPOSED to be registered. I suppose some of that
has fallen by the wayside as all these new players rush in an d write their
applications to do whatever. I checked the IANA database www.iana.org and
clipped a few of interest. Some we know and love. I was surprised by a
couple.
224.0.0.0 Base Address (Reserved) [RFC1112,JBP]
224.0.0.1 All Systems on this Subnet [RFC1112,JBP]
224.0.0.2 All Routers on this Subnet [JBP]
224.0.0.3 Unassigned [JBP]
224.0.0.4 DVMRP Routers [RFC1075,JBP]
224.0.0.5 OSPFIGP OSPFIGP All Routers [RFC2328,JXM1]
224.0.0.6 OSPFIGP OSPFIGP Designated Routers [RFC2328,JXM1]
224.0.0.7 ST Routers [RFC1190,KS14]
224.0.0.8 ST Hosts [RFC1190,KS14]
224.0.0.9 RIP2 Routers [RFC1723,GSM11]
224.0.0.10 IGRP Routers [Farinacci]
224.0.0.11 Mobile-Agents [Bill Simpson]
224.0.0.12 DHCP Server / Relay Agent [RFC1884]
224.0.0.13 All PIM Routers [Farinacci]
224.0.0.14 RSVP-ENCAPSULATION [Braden]
224.0.0.15 all-cbt-routers [Ballardie]
224.0.0.22 IGMP [Deering]
224.0.1.39 cisco-rp-announce [Farinacci] wonder what this stuff is ;->
224.0.1.40 cisco-rp-discovery [Farinacci]
Cisco calls this "bi-directional PIM" guess I'll be doing some reading on
this soon.
224.0.1.47 telerate [Peng] if this is the telerate I know and used to
hate, they have long since been subsumed by Bridge
224.0.1.48 ciena [Rodbell] doesn't Cisco own a piece of these folks?
224.0.1.118 Tivoli Systems [Gabriel]
224.0.1.128 CNN [Lynch] oh boy I can hardly wait!
224.0.6.000-224.0.6.127 Cornell ISIS Project [Tim Clark] didn't someone
say ISIS was dead?
Chuck
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
FREDL L AZARES
Sent: Friday, December 22, 2000 8:01 PM
To: [EMAIL PROTECTED]
Subject: Configuration Exercise: BCSN
I am currently studying for the BCSN exam, have a question . . .
1. For those who have a copy of Cisco Press BCSN
ISBN:1-57870-228-3:
Page 58 Step 12, Question: How many paths are in the IGRP routing table
to the 192.168.x.64 subnet?
Why are multiple paths to the subnet?
Answer: There are three routes to the 192.168.x.64 subnet in the routing
table. there are multiple paths
in the routing table because they are all of equal metric (in this case,
the metric is 158350).
I don't understand how the author arrived with three routes to the
192.168.x.64 subnet. Also, the metric
= 158,350. I know the BW=64000 and time delay = metric/bw= 2.4742
seconds. How did they arrived with this metric of 158,350?
Thanx in advance . . .
FREDL AZARES
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