09-08-2003 11:38 AM - edited 03-02-2019 10:11 AM
Hello. I have two 2500 series routers. I can't ping either router. Here is what I know...
On both routers, all ethernet and serial ports are up, and all protocols show up. I can view each router in the show CDP neighbors. I have set clock rates on DCEs, done the no shuts, set the bandwidth, everything shows as ok but I cannot ping from router to router. Please help.
09-08-2003 11:47 AM
Did you turn on IP routing by using the "ip routing" command on both routers?
09-08-2003 11:47 AM
Can you paste your configs
09-08-2003 12:16 PM
make sure they are on the same subnet .
router a
s0 10.1.1.1 255.255.255.252
router b
s0 10.1.1.2 255.255.255.252
09-08-2003 12:36 PM
* Yes, I did enable ip routing on both routers
* Below is a copy of both (Show CDP neighbors) and (Show Interfaces)
Router1>SHOW CDP NEIGHBORS DETAIL
-------------------------
Device ID: Router2
Entry address(es):
IP address: 60.0.0.1
Platform: cisco 2507, Capabilities: Router
Interface: Serial0, Port ID (outgoing port): Serial0
Holdtime : 152 sec
Version :
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-JK8OS-L), Version 12.2(1d), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Sun 03-Feb-02 22:01 by srani
advertisement version: 2
-------------------------
Device ID: Sol
Entry address(es):
IP address: 60.0.0.1
Platform: cisco 2507, Capabilities: Router
Interface: Serial0, Port ID (outgoing port): Serial0
Holdtime : 92 sec
Version :
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-JK8OS-L), Version 12.2(1d), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Sun 03-Feb-02 22:01 by srani
advertisement version: 2
************************************************************************************************************************************************
Router1#sh int
Ethernet0 is up, line protocol is up , using hub 0
Hardware is Lance, address is 00e0.1e68.a755 (bia 00e0.1e68.a755)
Internet address is 10.0.0.1/8
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)
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:03, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
486 packets output, 42756 bytes, 0 underruns(0/0/0)
0 output errors, 0 collisions, 16 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Serial0 is up, line protocol is up
Hardware is HD64570
Internet address is 20.0.0.1/8
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:04, output 00:00:05, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 48 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
481 packets input, 27992 bytes, 0 no buffer
Received 481 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
483 packets output, 28118 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
13 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Serial1 is up, line protocol is up
Hardware is HD64570
Internet address is 30.0.0.1/8
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:06, output 00:00:07, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 48 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
13 packets input, 1476 bytes, 0 no buffer
Received 13 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
10 packets output, 624 bytes, 0 underruns
0 output errors, 0 collisions, 5 interface resets
0 output buffer failures, 0 output buffers swapped out
1 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Router1#
09-08-2003 12:47 PM
your serial interfaces are on different subnets , they need to be on the same subnet to ping each other
09-08-2003 01:23 PM
--begin ciscomoderator note-- The following post has been edited to remove potentially confidential information. Please refrain from posting confidential information on the site to reduce security risks to your network. -- end ciscomoderator note --
I have assigned all interfaces on both routers with the same subnet mask. I use the ip addresses 50.0.0.1, x.x.0.1, and x.x.0.1 on the other router interfaces but the same subnet mask. Below is a copy of the show run. I don't understand what I'm doing wrong.
Router1#show run
Building configuration...
Current configuration : 1774 bytes
!
version 12.2
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Router1
!
logging rate-limit console 10 except errors
enable secret 5 xxxxxxxxxxxxxxxxxxxxxxxx
enable password xxxxxxxxxxxxxxxxxxxxxxxx
!
ip subnet-zero
no ip finger
!
no ip dhcp-client network-discovery
!
!
!
!
--More--
hub ether 0 1
link-test
auto-polarity
source-address 0010.0000.0000
interface Ethernet0
ip address 10.0.0.1 255.0.0.0
no ip mroute-cache
no mop enabled
!
interface Serial0
bandwidth 64
ip address x.x.0.1 255.0.0.0
no ip mroute-cache
!
interface Serial1
bandwidth 64
ip address x.x.0.1 255.0.0.0
no ip mroute-cache
clockrate 9600
dce-terminal-timing-enable
!
router rip
network 10.0.0.0
network x.x.0.0
network x.x.0.0
!
ip kerberos source-interface any
ip classless
ip http server
!
!
snmp-server community xxxxxxxxxxxxxx RO
!
line con 0
transport input none
line aux 0
line vty 0 4
password xxxxxxxxxxxx
login
--More--
!
end
Router1#
09-08-2003 02:34 PM
--begin ciscomoderator note-- The following post has been edited to remove potentially confidential information. Please refrain from posting confidential information on the site to reduce security risks to your network. -- end ciscomoderator note --
router 1
serial 0
ip address x.x.0.1 255.0.0.0
according to the cdp output above the s0 of router 2 connects to this interface, in order to ping , serial 0 of router 2 must be on the same network currently the ip address of s0 of router 2 is x.x.0.1 . change the ip address on serial 0 of router 2 to x.x.0.2 255.0.0.0, then you will be able to ping , this needs to be done on serial 1 of both routers also
09-08-2003 03:58 PM
Thank you for the help, it works to have both Serial Interfaces on the same network number. I'm still confused because originally I had (network x.x.0.1 on Router1 Serial 1) ping (Router2 network x.x.0.1 on Serial 1) and it was working just fine. The only reason that it doesn't work currently is because someone erased and reloaded router2, I couldn't get the configurations the same.
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