From: Dino Picinich (dino.picinich@gmail.com)
Date: Wed Mar 12 2008 - 09:34:55 ARST
Hi - Strange problem that I can't seem to grasp an understanding on. It's a
simple frame relay hub and spoke topology with R1 as the hub w/ multipoint
interface and R4 and R5 as the spokes on main interface. The lab is just
showing the functionality of split horizon in this environment when running
RIP over it. The strange thing is if I ping the LAN interfaces from spoke
to spoke specifying the source as f0/0, I get 100%. If I ping and do not
specify the source (in this case it will default to S1/0) I only get 50%
success rate. An ICMP debug from R4 (source in this case pinging
destination R5 f0/0), reveals the following:
ICMP: redirect rcvd from 10.0.0.1- for 5.0.0.5 use gw 10.0.0.5
I confirmed there is no active frame circuit between R4 and R5 and confirmed
the path it takes within the network:
Rack1R4#trace 5.0.0.5
Type escape sequence to abort.
Tracing the route to 5.0.0.5
1 10.0.0.1 4 msec 8 msec 4 msec
2 10.0.0.5 8 msec * 20 msec
Rack1R4#
I disabled redirects on the multipoint interface of R1 but get the same 50%
success rate. I did a passive-interface on all of my f0/0 interfaces but to
no avail. Any help over this hump would be greatly appreciated.
Below are the configs from the three routers:
*******************R1******************
Rack1R1#sh run
Building configuration...
Current configuration : 1413 bytes
!
version 12.4
no service timestamps debug uptime
no service timestamps log uptime
no service password-encryption
!
hostname Rack1R1
!
boot-start-marker
boot-end-marker
!
enable password cisco
!
no aaa new-model
memory-size iomem 5
no ip cef
!
no ip domain lookup
!
interface FastEthernet0/0
ip address 1.0.0.1 255.0.0.0
speed 100
full-duplex
!
interface FastEthernet0/1
no ip address
shutdown
speed 100
full-duplex
!
interface Serial1/0
no ip address
no ip redirects
encapsulation frame-relay
no ip route-cache
serial restart-delay 0
no frame-relay inverse-arp
!
interface Serial1/0.1 multipoint
ip address 10.0.0.1 255.0.0.0
no ip redirects
no ip route-cache
no ip split-horizon
frame-relay map ip 10.0.0.4 104 broadcast
frame-relay map ip 10.0.0.5 105 broadcast
!
interface Serial1/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
router rip
passive-interface FastEthernet0/0
network 1.0.0.0
network 10.0.0.0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
control-plane
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
line vty 0 4
password cisco
login
!
***************R4**********************
Rack1R4#sh run
Building configuration...
Current configuration : 1257 bytes
!
version 12.4
no service timestamps debug uptime
no service timestamps log uptime
no service password-encryption
!
hostname Rack1R4
!
boot-start-marker
boot-end-marker
!
enable password cisco
!
no aaa new-model
memory-size iomem 5
ip cef
!
no ip domain lookup
!
interface FastEthernet0/0
ip address 4.0.0.4 255.0.0.0
speed 100
full-duplex
!
interface FastEthernet0/1
no ip address
shutdown
speed 100
full-duplex
!
interface Serial1/0
ip address 10.0.0.4 255.0.0.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 10.0.0.1 401 broadcast
frame-relay map ip 10.0.0.5 401
no frame-relay inverse-arp
!
interface Serial1/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
router rip
passive-interface FastEthernet0/0
network 4.0.0.0
network 10.0.0.0
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
control-plane
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
line vty 0 4
password cisco
login
!
end
******************R5******************
Rack1R5#sh run
Building configuration...
Current configuration : 1265 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Rack1R5
!
boot-start-marker
boot-end-marker
!
enable password cisco
!
no aaa new-model
memory-size iomem 5
ip cef
!
no ip domain lookup
!
interface FastEthernet0/0
ip address 5.0.0.5 255.0.0.0
speed 100
full-duplex
!
interface FastEthernet0/1
no ip address
shutdown
speed 100
full-duplex
!
interface Serial1/0
ip address 10.0.0.5 255.0.0.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 10.0.0.1 501 broadcast
frame-relay map ip 10.0.0.4 501
no frame-relay inverse-arp
!
interface Serial1/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
router rip
passive-interface FastEthernet0/0
network 5.0.0.0
network 10.0.0.0
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
control-plane
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
line vty 0 4
password cisco
login
!
end
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