I have a home lab I’m setting up but I can’t seem to route over my serial connection. I can ping 172.16.3.1 (and 2.1) from the R1 router. I can not ping those addresses from my PC (network 172.21.1.0 connected to the interface 172.21.1.254 via a switch). These are 2 3640 routers (172.16.2.1 is a 2509).
configs:
R1#sho run
Building configuration…
Current configuration : 1178 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
no logging console
enable secret 5 $1$kah1$NMF4HHHmrWuY8NcA2ZErD1
!
no aaa new-model
!
resource policy
!
!
!
ip cef
ip host Access 172.16.2.1
ip host R2 172.16.3.1
no ip dhcp use vrf connected
ip dhcp excluded-address 172.21.1.1 172.21.1.49
ip dhcp excluded-address 172.21.1.200 172.21.1.254
!
ip dhcp pool R1_dhcp
network 172.21.1.0 255.255.255.0
default-router 172.21.1.254
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
username any privilege 15 password 0 any
!
!
!
!
!
!
interface Ethernet0/0
ip address 172.21.1.254 255.255.255.0
full-duplex
!
interface Serial1/0
ip address 172.16.3.2 255.255.255.252
!
interface Serial1/1
no ip address
shutdown
no dce-terminal-timing-enable
!
interface Serial1/2
no ip address
shutdown
no dce-terminal-timing-enable
!
interface Serial1/3
ip address 172.16.2.2 255.255.255.252
!
ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
password any
login local
!
!
end
R1#
R2#sho run
Building configuration…
Current configuration : 915 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$cOPA$oJK5Imw4lUSEdR45eVUp70
!
no aaa new-model
!
resource policy
!
!
!
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
username any privilege 15 password 0 any
!
!
!
!
!
!
interface Ethernet0/0
no ip address
shutdown
half-duplex
!
interface Serial1/0
ip address 172.16.3.1 255.255.255.252
clock rate 64000
no dce-terminal-timing-enable
!
interface Serial1/1
no ip address
shutdown
no dce-terminal-timing-enable
!
interface Serial1/2
no ip address
shutdown
no dce-terminal-timing-enable
!
interface Serial1/3
no ip address
shutdown
no dce-terminal-timing-enable
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
login local
!
!
end
R2#
Routing on R1
R1#sho 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 not set
172.16.0.0/30 is subnetted, 2 subnets
C 172.16.2.0 is directly connected, Serial1/3
C 172.16.3.0 is directly connected, Serial1/0
172.21.0.0/24 is subnetted, 1 subnets
C 172.21.1.0 is directly connected, Ethernet0/0
R1#
(note: my pc’s gateway was 172.21.1.254 also and I did a tracert and hit the 172.21.1.254 address but that’s it. The other addresses are directly connected networks so I don’t see the issue. I telnet from R1 to R2 too.)
Thanks