Are these routers directly connected? If so, that explains why you would still be able to ping. Did you try to use loopback interfaces and see if those routes are being announced?
ms --- CCIEn2002 wrote: > Thank you for the info. Now I am a little confused > still on > the passive interface. If it prevents routing > updates > from being sent out, why would one want a > passive interface. From my understanding, a > passive interface would not advertise is routing > updates to its neighbor. If that is the case, I am > perplexed > on why I can ping a passive interface that is being > advertised > thru a routing protocol. In my case, my neighbor > router > is seeing an IGRP update for the Ethernet network. > > Why would you make the Ethernet passive if you can > still > ping it and see its routing update from a > neighboring router > via the show ip route ? > This is where I get confused by the definition of > passive. > > Any help..I am a rookie as you can see > > David > > > ----- Original Message ----- > From: "cheekin" > To: ; > Sent: Wednesday, January 02, 2002 4:43 AM > Subject: Re: Passive Interface Help [7:30648] > > > > Hi, > > > > When you make the ethernet interface passive, it > means no igrp updates > will > > be sent out on the ethernet interface. It doesn't > stop the serial > interface > > from advertising network 12.0.0.0 . Which > explains why you can still ping > > to the ethernet interface. If for some reason you > do not want network > > 12.0.0.0 to be advertised, remove the network > 12.0.0.0 statement or use > > distribute-list to filter out the route. > > > > Regards, > > cheekin > > > > ----- Original Message ----- > > From: > > To: > > Sent: Wednesday, January 02, 2002 15:03 > > Subject: Passive Interface Help [7:30648] > > > > > > > Happy New Year!! > > > > > > I need a little help on what a passive > > > interface is. From what I can gather, a passive > > > interface does not advertise its route to its > > > neighbor ? Now if that is the case, why can > > > I still ping an interface that is set to > passive. > > > Please note: This is excluding directly > connected > > > routes. > > > > > > For example, I set my Cisco 2509 ethernet > interface > > > to passive. Why can I still ping the ethernet > address > > > from my neighboring router Cisco 4000 ? I am > > > running IGRP. Why does the ethernet network show > up in its routing table > > for > > > my Cisco 4000. From poking around with the > passive interface command it > > > seems that I can not ping my ethernet address > only if I set the Serial > > > interfaces to passive also. > > > This seems odd. I thought if I made an ethernet > interface passive, I > > should > > > not be able to ping it from a neighboring router > or any other router > since > > > it is not being > > > advertised. > > > > > > Below is a sample of me being able to ping > serial 1 off > > > my Cisco 2509 from my Cisco 4000. Serial 1 is > "not" > > > directly connected. Serial 1 is being > advertised. > > > > > > > > > > > > > > > Current configuration: > > > ! > > > version 12.0 > > > service timestamps debug uptime > > > service timestamps log uptime > > > no service password-encryption > > > ! > > > hostname Cisco2509 > > > ! > > > enable password router > > > ! > > > ip subnet-zero > > > ipx routing 0010.7be8.22f4 > > > ! > > > ! > > > ! > > > ! > > > ! > > > interface Ethernet0 > > > ip address 12.11.12.1 255.255.255.240 > > > no ip directed-broadcast > > > delay 1000 > > > ! > > > interface Serial0 > > > ip address 172.16.18.1 255.255.255.240 > > > no ip directed-broadcast > > > no ip mroute-cache > > > ipx network 3 > > > no fair-queue > > > clockrate 1000000 > > > ! > > > interface Serial1 > > > ip address 172.17.18.2 255.255.255.240 > > > no ip directed-broadcast > > > clockrate 4000000 > > > ! > > > router igrp 1 > > > passive-interface Ethernet0 > > > passive-interface Serial0 > > > passive-interface Serial1 > > > offset-list 2 out 11000 Serial0 > > > network 12.0.0.0 > > > network 172.16.0.0 > > > network 172.17.0.0 > > > ! > > > ip classless > > > ! > > > access-list 2 deny 12.11.12.1 > > > ! > > > ! > > > ! > > > ! > > > ! > > > line con 0 > > > transport input none > > > line 1 8 > > > line aux 0 > > > line vty 0 4 > > > password cisco > > > login > > > ! > > > end > > > > > > Cisco2509# > > > > > > > > > > > > Cisco_4000>ping 172.17.18.1 > > > > > > Type escape sequence to abort. > > > Sending 5, 100-byte ICMP Echos to 172.17.18.1, > timeout is 2 seconds: > > > !!!!! > > > Success rate is 100 percent (5/5), round-trip > min/avg/max = 120/120/124 > ms > > > Cisco_4000>ping 12.11.12.1 > > > > > > Type escape sequence to abort. > > > Sending 5, 100-byte ICMP Echos to 12.11.12.1, > timeout is 2 seconds: > > > ..... > > > Success rate is 0 percent (0/5) > > > Cisco_4000> [EMAIL PROTECTED] __________________________________________________ Do You Yahoo!? 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