Unable To Ping From One PC to the Other PC - Page 2

kgndata21 · ‎01-24-2021

I have a simple physical network of one Windows 10 laptop, a 1921 Cisco router, a 1921 Cisco router, and another Windows 10 laptop. Between the two routers is a serial link, and fast ethernet links from the routers to the PCs. Now, from the routers I can ping both PCs, but I am unable to ping from a Windows command prompt to the other PC (Request timed out). Pinging from the Windows command prompt to the FE side of the router is no problem, but I am unable to ping the router's serial IP address. I have Windows Firewall and Anti-virus application disabled. There doesn't seem to be an IP routing problem since I am able to ping from either router to the laptops. I just can't seem to get past either FE connection and into the Serial connections from within Windows. Oh, I am using crossover cables connecting laptops from USB ports to the routers FE ports. Why can't Windows 10 see past the routers' FE ports? Is there something I have to enable or disable?

kgndata21 · ‎02-04-2021

Hello Georg; Here are the configurations for both Router1 and Router2. These are the commands I issued on both routers:

card type t1 0 0

controller t1 0/0/0:0

framing esf

linecode b8zs

clock source line independent

Current configuration : 2078 bytes
!
! Last configuration change at 23:34:18 UTC Thu Feb 4 2021
!
version 15.8
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname Router1
!
boot-start-marker
boot-end-marker
!
!
card type t1 0 0
enable secret 5 $1$CVRI$7rLjz8fRYoquol7bqVC1/0
enable password 7 11021C131E1C
!
no aaa new-model
no network-clock-participate wic 0
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!

!
!
!
!
no ip domain lookup
ip domain name testlab.com
ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
license udi pid CISCO1921/K9 sn FJC1950E3BM
license boot module c1900 technology-package securityk9
license boot module c1900 technology-package datak9
!
!
!
redundancy
!
!
!
!
!
controller T1 0/0/0
clock source line independent
cablelength long 0db
channel-group 0 timeslots 1-24
!
controller T1 0/0/1
cablelength long 0db
channel-group 0 timeslots 1-24
!
!
!
!
!
!
!
!
!
!
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
no ip address
duplex auto
speed auto
!
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
!
interface Serial0/0/0:0
ip address 192.168.1.1 255.255.255.0
!
interface Serial0/0/1:0
no ip address
!
interface FastEthernet0/1/0
ip address 192.168.101.1 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1/1
no ip address
duplex auto
speed auto
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
ip route 192.168.100.0 255.255.255.0 192.168.1.2

!
ipv6 ioam timestamp
!
!
!
control-plane
!
banner motd ^C
Warning: Unauthorized access is strictly prohibited. ^C
!
line con 0
password 7 05080F1C2243
logging synchronous
login
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport output lat pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
password 7 045802150C2E
login
transport input telnet ssh
line vty 5 15
password 7 045802150C2E
login
transport input none
!
no scheduler allocate
!
end

Router1#

Current configuration : 1747 bytes
!
! Last configuration change at 23:50:36 UTC Thu Feb 4 2021
!
version 15.8
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router2
!
boot-start-marker
boot-end-marker
!
!
card type t1 0 0
!
no aaa new-model
no network-clock-participate wic 0
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!

!
!
!
!
no ip domain lookup
ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
license udi pid CISCO1921/K9 sn FJC1948E3ZX
license boot module c1900 technology-package securityk9
license boot module c1900 technology-package datak9
!
!
!
redundancy
!
!
!
!
!
controller T1 0/0/0
clock source line independent
cablelength long 0db
channel-group 0 timeslots 1-24
!
controller T1 0/0/1
cablelength long 0db
channel-group 0 timeslots 1-24
!
!
!
!
!
!
!
!
!
!
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
no ip address
duplex auto
speed auto
!
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
!
interface Serial0/0/0:0
ip address 192.168.1.2 255.255.255.0
!
interface Serial0/0/1:0
no ip address
!
interface FastEthernet0/1/0
ip address 192.168.100.1 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1/1
no ip address
shutdown
duplex auto
speed auto
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
ip route 192.168.101.0 255.255.255.0 Serial0/0/0:0
!
ipv6 ioam timestamp
!
!
!
control-plane
!
!
line con 0
logging synchronous
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport output lat pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
login
transport input none
!
scheduler allocate 20000 1000
!
end

Router2#

kgndata21 · ‎02-04-2021

Hello. If you can, please take a look at my last reply to Georg. I included my commands for the T1 controller on both routers plus my full configurations for both routers. The thing is I can ping PC1 from the console port of router2, and I can ping PC2 from the the console port of router1. I don't get it. why can't PC1 ping PC2?

Georg Pauwen · ‎02-05-2021

Hello,

odd indeed. If R1 an ping PC2, and R2 can ping PC1, then the T1 must be good.

Try 'encapsulation ppp' on the serial interfaces...