Awesome Observation, Chuck!! Keep up the good work!!
>From: "The Long and Winding Road" >Reply-To: "The Long and Winding Road" >To: [EMAIL PROTECTED] >Subject: Random observations about EIGRP networks [7:61302] >Date: Sat, 18 Jan 2003 18:16:24 GMT > >based on a recent thread regarding the 0.0.0.0 network > >since about 12.0 or so, when placing networks into EIGRP, one can use a >wildcard mask. > >example: > >router eigrp 100 >network 1.1.0.0 0.0.255.255 > >which places 1.1.0.0/16 into the eigrp process. > >I did a bit of digging around both the Doc CD and the TAC site, but >surprisingly, I can find nothing in the way of documentation for this >feature. > >following are a couple of things I did, and the results. > >Router 3 >------------- >interface Loopback101 > ip address 7.50.1.1 255.255.255.0 >! >interface Loopback102 > ip address 6.50.1.1 255.255.255.0 >! >interface Loopback103 > ip address 5.50.1.1 255.255.255.0 >! >interface Loopback104 > ip address 4.50.1.1 255.255.255.0 >! >interface Loopback201 > ip address 168.95.1.5 255.255.255.0 >! >interface Loopback202 > ip address 170.177.1.5 255.255.255.0 >! >interface Loopback203 > ip address 171.17.47.5 255.255.255.0 >! >interface Loopback204 > ip address 169.30.101.5 255.255.255.0 >! >interface TokenRing0 > ip address 199.1.1.2 255.255.255.252 > ring-speed 4 >! >router eigrp 200 > network 4.0.0.0 3.255.255.255 > network 168.0.0.0 3.255.255.255 > network 199.1.1.0 0.0.0.3 > no auto-summary > no eigrp log-neighbor-changes >! >Router 4 routing table >------------------------------ >Router_4#ir ei > 170.177.0.0/24 is subnetted, 1 subnets >D 170.177.1.0 [90/832000] via 199.1.1.2, 10:47:03, TokenRing0 > 171.17.0.0/24 is subnetted, 1 subnets >D 171.17.47.0 [90/832000] via 199.1.1.2, 10:47:03, TokenRing0 > 168.95.0.0/24 is subnetted, 1 subnets >D 168.95.1.0 [90/832000] via 199.1.1.2, 10:47:03, TokenRing0 > 169.30.0.0/24 is subnetted, 1 subnets >D 169.30.101.0 [90/832000] via 199.1.1.2, 10:47:03, TokenRing0 > 4.0.0.0/24 is subnetted, 1 subnets >D 4.50.1.0 [90/832000] via 199.1.1.2, 10:47:03, TokenRing0 > 5.0.0.0/24 is subnetted, 1 subnets >D 5.50.1.0 [90/832000] via 199.1.1.2, 10:47:03, TokenRing0 > 6.0.0.0/24 is subnetted, 1 subnets >D 6.50.1.0 [90/832000] via 199.1.1.2, 10:47:03, TokenRing0 > 7.0.0.0/24 is subnetted, 1 subnets >D 7.50.1.0 [90/832000] via 199.1.1.2, 10:47:03, TokenRing0 >Router_4# > >I find the notation that 4.0.0.0/24 is subnetted with one subnet interesting > >Note also that the wildcard mask bits must be contiguous, which is one of >the idiot proofing features introduced in 12.0 Takes all the fun out of >wildcard masking, both for EIGRP and for OSPF. > >As we discussed elsewhere, the command "network 0.0.0.0" places all >connected interfaces, and thus all connected networks, into the eigrp >process. if automatic summarization is enabled, then routes to null0 are >generated. > >I'm not sure there is a lot of wisdome to be found in this kind of study. >The maks, and therefore the placing of interfaces rather than entire >classful networks, into the routing process allows for cleaner operation. >otherwise, it is something of a bother. >-- >TANSTAAFL misconduct and Nondisclosure violations to [EMAIL PROTECTED] ------------------------------------------------------------------------ The new MSN 8 is here: Try it free* for 2 months Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=61309&t=61302 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
