Unroutable?? Help!!

[cbd1]

I am hoping someone can give me a clue on where to look next. This is a 2610 connected directly (via crossover) to a cellular internet device. With the device set to offer the public cellular net assigned IP via DHCP, the router works fine. However, with the device set to offer a private IP, the address is assigned, and the arp table populated but the router can't route to/through it. Here is the config and some debug/show command outputs. Any help would be greatly appreciated!! Thanks in Advance!

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rbos1-0425#sh run
Building configuration...

Current configuration : 2303 bytes
!
! Last configuration change at 13:30:29 est Tue Feb 6 2007
!
version 12.3
service config
service timestamps debug datetime localtime
service timestamps log datetime localtime
service password-encryption
!
hostname rbos1-0425
!
boot-start-marker
boot-end-marker
!
logging buffered 10000 debugging
no logging console
enable secret ******
!
clock timezone est -5
no network-clock-participate slot 1
no network-clock-participate wic 0
no aaa new-model
ip subnet-zero
ip cef
!
!
!
no ip domain lookup
!
x25 routing
!
!
!
interface Loopback0
no ip address
shutdown
!
interface FastEthernet0/0
ip address dhcp
duplex auto
speed auto
!
interface Serial1/0
description X25 connection for Base 6274
no ip address
encapsulation x25 dce
no ip mroute-cache
x25 htc 8
x25 win 7
x25 wout 7
x25 ips 512
x25 ops 512
clock rate 19200
no cdp enable
!
interface Serial1/1
no ip address
no ip mroute-cache
no cdp enable
!
interface Serial1/2
no ip address
no ip mroute-cache
no cdp enable
!
interface Serial1/3
no ip address
no ip mroute-cache
no cdp enable
!
interface Async1
ip address 10.40.244.217 255.255.240.0
encapsulation ppp
dialer in-band
dialer idle-timeout 60
dialer wait-for-carrier-time 20
dialer string 19727920229
dialer string 17326022341
dialer-group 1
async default routing
async mode dedicated
ppp authentication chap
ppp chap hostname rbos1-0425
ppp chap password ******
!
router eigrp 1
passive-interface FastEthernet0/0
network 10.0.0.0
no auto-summary
eigrp stub connected
!
ip classless
ip route 10.0.0.0 255.0.0.0 Async1
ip route 0.0.0.0 0.0.0.0 dhcp
ip route 4.2.2.2 255.255.255.255 dhcp
ip http server
!
access-list 101 deny eigrp any any
access-list 101 deny udp any any
access-list 101 permit ip any any
dialer-list 1 protocol ip list 101
x25 route 11280508 xot *******
!
line con 0
exec-timeout 15 0
password ****
login
line 1
modem InOut
stopbits 1
speed 115200
flowcontrol hardware
line aux 0
password ********
login
line vty 0 4
exec-timeout 15 0
password ******
logging synchronous
login
transport input telnet
!
ntp clock-period 17208604
ntp server 142.179.100.217
!
end


rbos1-0425# sh int f0/0
FastEthernet0/0 is up, line protocol is up
Hardware is AmdFE, address is 000e.84df.fb60 (bia 000e.84df.fb60)
Internet address is 192.168.13.1/24
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Half-duplex, 10Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00

DEBUG AND ROUTES/ARP TABLE

rbos1-0424#
Feb 6 14:33:34: %SYS-5-CONFIG_I: Configured from console by vty1 (10.40.240.6)
Feb 6 14:33:35: DHCP: Adding static route to 0.0.0.0 0.0.0.0 via 192.168.13.31
Feb 6 14:33:35: Adding static route to 192.168.13.31 255.255.255.255 via 192.168.13.31
Feb 6 14:33:35: Adding DNS server address 68.28.114.11
Feb 6 14:33:35: Adding DNS server address 68.28.122.11
Feb 6 14:33:35: DHCP Client Pooling: ***Allocated IP address: 192.168.13.1
Feb 6 14:33:35: Allocated IP address = 192.168.13.1 255.255.255.0

Feb 6 14:33:35: %DHCP-6-ADDRESS_ASSIGN: Interface FastEthernet0/0 assigned DHCP address 192.168.13.1, mask 255.255.255.0, hostname rbos1-0424


bos1-0424#sh arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.13.1 - 0013.1928.bcc0 ARPA FastEthernet0/0
Internet 192.168.13.31 1 0014.3e00.50d5 ARPA FastEthernet0/0

rbos1-0424#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is 192.168.13.31 to network 0.0.0.0

192.168.13.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.13.0/24 is directly connected, FastEthernet0/0
S 192.168.13.31/32 [254/0] via 192.168.13.31
4.0.0.0/32 is subnetted, 1 subnets
S 4.2.2.2 [1/0] via 192.168.13.31
10.0.0.0/8 is variably subnetted, 3 subnets, 3 masks
S 10.0.0.0/8 is directly connected, Async1
C 10.40.240.0/20 is directly connected, Async1
C 10.40.240.6/32 is directly connected, Async1
S* 0.0.0.0/0 [254/0] via 192.168.13.31


rbos1-0424#ping 4.2.2.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.2.2.2, timeout is 2 seconds:

Feb 6 14:35:35: %SYS-5-CONFIG_I: Configured from console by vty1 (10.40.240.6)
Feb 6 14:35:36: IP: s=10.40.244.216 (local), d=224.0.0.10 (Async1), len 66, sending broad/multicast
Feb 6 14:35:37: IP: s=192.168.13.1 (local), d=4.2.2.2, len 100, unroutable. <-----????
Feb 6 14:35:39: IP: s=192.168.13.1 (local), d=4.2.2.2, len 100, unroutable.
Feb 6 14:35:41: IP: s=192.168.13.1 (local), d=4.2.2.2, len 100, unroutable
Feb 6 14:35:41: IP: s=10.40.244.216 (local), d=224.0.0.10 (Async1), len 66, sending broad/multicast.
Feb 6 14:35:43: IP: s=0.0.0.0 (local), d=142.179.100.217, len 76, unroutable
Feb 6 14:35:43: IP: s=192.168.13.1 (local), d=4.2.2.2, len 100, unroutable.
Feb 6 14:35:45: IP: s=192.168.13.1 (local), d=4.2.2.2, len 100, unroutable.

rbos1-0424#ping 192.168.13.31

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.13.31, timeout is 2 seconds:

Feb 6 14:35:55: IP: s=10.40.244.216 (local), d=224.0.0.10 (Async1), len 66, sending broad/multicast
Feb 6 14:35:56: IP: s=192.168.13.1 (local), d=192.168.13.31, len 100, unroutable. <---- What the?
Feb 6 14:35:59: IP: s=192.168.13.1 (local), d=192.168.13.31, len 100, unroutable.
Feb 6 14:36:00: IP: s=10.40.244.216 (local), d=224.0.0.10 (Async1), len 66, sending broad/multicast
Feb 6 14:36:01: IP: s=192.168.13.1 (local), d=192.168.13.31, len 100, unroutable.
Feb 6 14:36:03: IP: s=192.168.13.1 (local), d=192.168.13.31, len 100, unroutable.
Feb 6 14:36:05: IP: s=192.168.13.1 (local), d=192.168.13.31, len 100, unroutable

 

[octavian10]

2 things, what do you mean when you say the device is set to offer a private address? Is the problem that once you get away from the DHCP you can not access the internet? The main thing that jumps out at me is you are telling the router to route everthing not in the local routing table to DHCP, ie ip route 0.0.0.0 0.0.0.0 dhcp, if are going from a dhcp address to static this will not work. You will need to change this to the next hop ip address of your isp. Im not 100% sure of what your main issue is but hope this helps.

"I hear and I forget. I see and I remember. I do and I understand."
- Confucius (551 BC - 479)

 

[cbd1]

Thank you for the reply. I will try to better explain. The device directly connected to the ethernet port via crossover cable is an Airlink Raven. It is an EVDO Internet access device with a single Ethernet port. The device offers 2 options for the internal lan host/s. DHCP, offering a private IP address, which it then NATs to the public address it was assigned when it powered up and registered on the cellular network. Or, it can pass the public address to the internal host (router) via DHCP. I have about 220 of these devices currently deployed using the private addressing scheme. Unfortunately, I have a hand full doing what I have posted above. They are all using 2610 and 2610XM routers with IOS versions 12.3-10 and 12.3-12b. I have included the DHCP output as well as the routing and ARP table to show that the Raven device does indeed assign a DHCP address and gateway(itself). What really concerns me is that even when I try and ping the Raven device at 192.168.13.31, the debug reports "unroutable". I don't see how this can be possible as the device is directly connected and defined in the arp table and is the gateway which just assigned the address to the Ethernet. I first tried to blame this on the Raven devices, but now after some debugging, I believe it to be a router issue due to the "unroutable" output. Only a few seem to have this problem (4 of 200+), and it goes away if I set the Raven device to assign the public address via DHCP to the router. Unfortunately, I really need to use the private addressing internally. I hope this helps to explain a little better. Again, thanks for your time.

 

[plshlpme]

maybe try changing your routing to point to the physical interface?

ie: ip route 0.0.0.0 0.0.0.0 fa0/0

also it should be a default in that ios
but maybe type in "ip routing"
in global config and see if anything changes..

there is no natting going on here so it should be pretty straight forward...

what is the full IOS train? IP or IP plus ?

 

[cbd1]

Thanks for the reply. I tried the route to the physical interface. Still reports unroutable. Tried "ip routing" which didn't change anything and it doesn't even show in the config on this ios. IOS=c2600-i-mz.123-12b.bin