From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Sun Jan 27 2008 - 00:49:13 ARST
You're asking us where R4 is getting the Frame Relay mapping to R5 from
but you didn't include the output of the "show frame map" command from R4
;-)
Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: +1-775-544-1653 (Outside the US and Canada)
>----- Original Message -----
Subject: Frame relay problem
Date: Fri, January 25, 2008 7:14
From: "Ernst Pelser" <e.pelser@infosecureltd.com>
> 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#
>
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