From: Scott Morris (smorris@ipexpert.com)
Date: Sun Jan 27 2008 - 00:27:30 ARST
Do a "show frame map" and see whether you learned any magical mappings
before you turned off inverse arp!
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE-M
#153, JNCIS-ER, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
VP - Technical Training - IPexpert, Inc.
IPexpert Sr. Technical Instructor
A Cisco Learning Partner - We Accept Learning Credits!
Telephone: +1.810.326.1444
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-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Ernst Pelser
Sent: Friday, January 25, 2008 10:14 AM
To: ccielab@groupstudy.com
Subject: Frame relay problem
Hi All
I'm seeing a bit of odd behaviour on my frame relay network and need some
input on this please. I'm currently working on the Adv. Tech workbook4.0 -
OSPF section. (Page 14).
I have routers R1, R4 and R5 connected in a hub-spoke config over a
frame-relay cloud. R1 is the hub. They all connect via static L2/L3
mappings. For instance R4 connects to R1 and R5 using pvc 401. Inverse arp
is also disabled.
I also have OSPF running over the cloud and all the serial interfaces are
configured as OSPF type Broadcast interfaces.
Here is what I'm seeing....
R4 magically decides that it will try connect to R5 over PVC405 which has
not manually been configured. The Frame-relay switch is configured for
PVC405 but the router hasn't been. I'm not seeing this on R5's side even
though the FR switch has been configured for PVC504. Where is R4 getting
this mapping from?
I have pasted my configs below.
Thanks, EP.
R1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip subnet-zero
ip cef
!
!
no ip domain lookup
!
!
!
!
!
interface Ethernet0/0
ip address 1.0.0.1 255.0.0.0
half-duplex
!
interface Serial0/0
ip address 10.0.0.1 255.0.0.0
encapsulation frame-relay
ip ospf network broadcast
ip ospf priority 255
frame-relay map ip 10.0.0.4 104 broadcast frame-relay map ip 10.0.0.5 105
broadcast no frame-relay inverse-arp !
interface Serial0/1
no ip address
shutdown
!
router ospf 1
router-id 10.0.0.1
log-adjacency-changes detail
network 0.0.0.0 255.255.255.255 area 0
!
ip http server
ip classless
!
!
alias exec inb sh ip int brief
alias exec c conf t
alias exec r sho run
alias exec rb sho run | be
alias exec i show ip route
alias exec o show ip ospf ne
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
!
!
!
end
R4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R4
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip subnet-zero
!
!
no ip domain lookup
!
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Ethernet0/0
ip address 4.0.0.4 255.0.0.0
half-duplex
!
interface Serial0/0
ip address 10.0.0.4 255.0.0.0
encapsulation frame-relay
ip ospf network broadcast
ip ospf priority 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 Ethernet0/1
no ip address
shutdown
half-duplex
!
interface Serial0/1
no ip address
shutdown
!
router ospf 1
router-id 10.0.0.4
log-adjacency-changes detail
network 0.0.0.0 255.255.255.255 area 0
!
ip http server
ip classless
!
!
!
!
R5
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R5
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip subnet-zero
!
!
no ip domain lookup
!
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Ethernet0/0
ip address 5.0.0.5 255.0.0.0
half-duplex
!
interface Ethernet0/1
no ip address
shutdown
half-duplex
!
interface Serial1/0
ip address 10.0.0.5 255.0.0.0
encapsulation frame-relay
ip ospf network broadcast
ip ospf priority 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
!
interface Serial1/2
no ip address
shutdown
!
interface Serial1/3
no ip address
shutdown
!
interface Serial1/4
no ip address
shutdown
!
interface Serial1/5
no ip address
shutdown
!
interface Serial1/6
no ip address
shutdown
!
interface Serial1/7
no ip address
shutdown
!
router ospf 1
router-id 10.0.0.5
log-adjacency-changes
network 0.0.0.0 255.255.255.255 area 0
!
ip http server
ip classless
!
!
!
!
!
!
!
alias exec c conf t
alias exec r sho run
alias exec rb sho run | be
alias exec i show ip route
alias exec o show ip ospf ne
alias exec inb sh ip int brief
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
!
!
end
Also see R4's OSPF neighb...
Neighbor ID Pri State Dead Time Address Interface
10.0.0.1 255 FULL/DR 00:00:32 10.0.0.1 Serial0/0
10.0.0.5 0 INIT/DROTHER 00:00:36 10.0.0.5 Serial0/0
R4#
This archive was generated by hypermail 2.1.4 : Fri Feb 01 2008 - 10:38:01 ARST