From: Tim Fletcher (tim@fletchmail.net)
Date: Sat Nov 30 2002 - 20:24:10 GMT-3
Charles,
The 135.1.20.0/22 between r3 and r4 will not get redistributed into IGRP because it is classfull. When you ping from r3, your source address is going to be 135.1.20.3. The request will get to the other end ok (you can confirm this with "debug ip icmp"), but the reply does not have a route for the return path.
-tim
At 01:02 PM 11/30/02 -0800, Charles T. Alexander wrote:
>r2 &
>r3---x.25--r4--ethernet--r5
>ospf ospf igrp
> igrp rip
>
>r5 can ping r4, r3, r2
>r4 can ping r2, r3, r5
>r2&r3 can ping r4
>r3&r2 can't ping r5
>
>I think I am missing some concept.
>
>Below are the configs for r3,r4,r5
>
>r3#r
>Building configuration...
>
>Current configuration:
>!
>version 12.1
>service timestamps debug uptime
>service timestamps log uptime
>no service password-encryption
>!
>hostname r3
>!
>logging buffered 10000 debugging
>enable password radnor
>!
>!
>!
>!
>!
>ip subnet-zero
>no ip domain-lookup
>!
>lane client flush
>cns event-service server
>!
>!
>!
>!
>!
>interface Loopback0
> ip address 135.1.13.3 255.255.255.0
> ip ospf network point-to-point
>!
>interface Tunnel0
> ip address 135.1.101.3 255.255.255.0
> tunnel source 135.1.20.3
> tunnel destination 135.1.20.2
>!
>interface BRI0/0
> no ip address
> shutdown
>!
>interface Ethernet0/0
> no ip address
> shutdown
>!
>interface TokenRing0/0
> ip address 135.1.3.3 255.255.255.240
> ring-speed 16
>!
>interface Serial1/0
> bandwidth 64
> ip address 135.1.20.3 255.255.252.0
> encapsulation x25
> ip ospf network point-to-multipoint
> x25 address 3333
> x25 map ip 135.1.20.2 2222 broadcast
> x25 map ip 135.1.20.4 4444 broadcast
>!
>interface Serial1/1
> no ip address
> shutdown
> clockrate 2015232
>!
>interface Serial1/2
> no ip address
> shutdown
> clockrate 2015232
>!
>interface Serial1/3
> no ip address
> shutdown
>!
>router ospf 11
> area 0 range 135.1.3.0 255.255.255.0
> network 135.1.3.0 0.0.0.15 area 0
> network 135.1.13.0 0.0.0.255 area 0
> network 135.1.20.0 0.0.3.255 area 4
> network 135.1.101.0 0.0.0.255 area 0
>!
>ip classless
>no ip http server
>!
>!
>alias exec i show ip route
>alias exec r show run
>alias exec c config t
>alias exec u undebug all
>alias exec b show ip bgp
>alias exec bs show ip bgp sum
>alias exec s show ip int brief
>!
>line con 0
> exec-timeout 0 0
> logging synchronous
> transport input none
> escape-character 27
>line aux 0
>line vty 0 4
> password bp
> login
>!
>end
>
>-------------------
>r4#r
>Building configuration...
>
>Current configuration : 1297 bytes
>!
>version 12.2
>service timestamps debug uptime
>service timestamps log uptime
>no service password-encryption
>!
>hostname r4
>!
>logging buffered 10000 debugging
>enable password radnor
>!
>ip subnet-zero
>no ip domain-lookup
>!
>!
>!
>!
>interface Loopback0
> ip address 135.1.14.4 255.255.255.0
>!
>interface Ethernet0
> bandwidth 1500
> ip address 135.1.1.4 255.255.255.0
>!
>interface Serial0
> bandwidth 64
> ip address 135.1.20.4 255.255.252.0
> encapsulation x25
> ip ospf network point-to-multipoint
> x25 address 4444
> x25 map ip 135.1.20.3 3333 broadcast
> x25 map ip 135.1.20.2 2222 broadcast
>!
>interface Serial1
> no ip address
> shutdown
>!
>interface TokenRing0
> no ip address
> shutdown
>!
>router ospf 11
> log-adjacency-changes
> summary-address 135.1.20.0 255.255.255.0
> redistribute igrp 11 subnets
> network 135.1.20.0 0.0.3.255 area 4
>!
>router igrp 11
> redistribute ospf 11
> passive-interface Serial0
> network 135.1.0.0
> default-metric 64 10 254 1 1500
>!
>ip classless
>ip http server
>ip pim bidir-enable
>!
>!
>alias exec i show ip route
>alias exec r show run
>alias exec c config t
>alias exec u undebug all
>alias exec b show ip bgp
>alias exec bs show ip bgp sum
>alias exec s show ip int brief
>!
>line con 0
> exec-timeout 0 0
> logging synchronous
> escape-character 27
>line aux 0
>line vty 0 4
> password bp
> login
>!
>end
>
>r4
>---------------------------------------------------
>r5#r
>Building configuration...
>
>Current configuration : 1231 bytes
>!
>version 12.2
>service timestamps debug uptime
>service timestamps log uptime
>no service password-encryption
>!
>hostname r5
>!
>logging buffered 10000 debugging
>enable password radnor
>!
>ip subnet-zero
>no ip domain-lookup
>!
>!
>!
>!
>interface Loopback0
> ip address 135.1.15.5 255.255.255.0
>!
>interface Loopback1
> ip address 12.1.1.1 255.255.255.0
>!
>interface Ethernet0
> ip address 135.1.1.5 255.255.255.0
>!
>interface Serial0
> no ip address
> shutdown
>!
>interface Serial1
> no ip address
> shutdown
>!
>router rip
> redistribute igrp 11
> passive-interface Ethernet0
> passive-interface Loopback0
> network 12.0.0.0
> default-metric 1
>!
>router igrp 11
> redistribute rip
> passive-interface Loopback1
> network 135.1.0.0
> default-metric 64 10 254 1 1500
> distribute-list 1 out
>!
>ip classless
>ip http server
>ip pim bidir-enable
>!
>access-list 1 permit 135.1.15.0 0.0.0.255
>access-list 1 permit 12.0.0.0 0.255.255.255
>!
>alias exec i show ip route
>alias exec r show run
>alias exec c config t
>alias exec u undebug all
>alias exec b show ip bgp
>alias exec bs show ip bgp sum
>alias exec s show ip int brief
>!
>line con 0
> exec-timeout 0 0
> logging synchronous
> escape-character 27
>line 1 8
> flush-at-activation
>line aux 0
>line vty 0 4
> password bp
> login
>!
>end
>
>
>
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This archive was generated by hypermail 2.1.4 : Tue Dec 03 2002 - 07:23:13 GMT-3