Dear Rich Sir,

brijendrasaini · ‎01-25-2017

in my topology all router are configured with ospf with area 10.My problem is that i am able to ping different router to eacha router but not able to ping clients.

Richard Burts · ‎01-25-2017

It is not clear whether from a router you can ping to clients connected to that router. Can you clarify on this?

If a router is successful in ping to locally connected clients but fails to ping remote clients then most likely it is either a problem in routing or is a problem with the gateway configured on the clients. If a router is not successful in ping to locally connected clients then most likely the problem is a firewall on he client which does not allow ping.

HTH

Rick

HTH

Rick

brijendrasaini · ‎01-25-2017

hi rick sir thanks for kind support me.

I HAVE 4 ROUTER

R1-SERIAL0/0193.200.200.1/24

F0/0-10.10.30.1/8

CLIENTS 10.10.30.2 GW 10.10.30.1

R2-SERIAL 0/0 193.200.200.2/24

SERIAL0/1-194.200.210.1/24

FO-172.16.32.1

CLENTS-172.16.32.2 GW-172.16.32.1

R3-SERIAL 0/0 194.200.210.2 /24

SERIAL0/1 192.168.1.1/24

FO-172.16.30.1

CLEINTS-172.16.30.2 GW-172.16.30.1

R4-SERIAL 0/1 192.168.1.2/24

FO-172.16.31.1

CLINETS-172.16.31.1 HAVE GATEWAY 172.16.31.1

on router r1

Tracing the route to 192.168.1.2

1 193.200.200.2 38 msec 19 msec 15 msec

2 194.200.210.2 41 msec 47 msec 11 msec

3 192.168.1.2 23 msec 2 msec 1 msec

but when i try to ping his clinets then i am not able to ping.

Regards

Brij

Richard Burts · ‎01-25-2017

Brij

You have provided additional details which may be helpful. But you have not answered the question that I asked. You have demonstrated connectivity between the serial interfaces of r1 and r4. What I asked is whether r1 is able to ping any client in the 10.10.30 network. Would you please answer that question?

HTH

Rick

HTH

Rick

brijendrasaini · ‎01-25-2017

Dear Rich Sir,

I am able to ping 10.10.30. network fro R1 and his clients :-

Below Is route MAp

C 10.0.0.0/8 is directly connected, FastEthernet0/0

O 172.16.0.0/16 [110/65] via 193.200.200.2, 00:02:56, Serial1/0

O 192.168.1.0/24 [110/192] via 193.200.200.2, 00:02:46, Serial1/0

C 193.200.200.0/24 is directly connected, Serial1/0

O 194.200.210.0/24 [110/128] via 193.200.200.2, 00:02:56, Serial1/0

indore#

indore#ping 10.10.30.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.10.30.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/5/14 ms

indore#ping 10.10.30.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.10.30.2, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/1 ms

indore#ping 10.10.30.3

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.10.30.3, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 0/3/15 ms

regards

Brij

Richard Burts · ‎01-26-2017

Brij

Thank you for the additional information. Seeing the content of the routing table is helpful and does show that r1 appears to have valid routes for the LAN subnets of the other routers. And it is especially helpful to see that r1 is successful in ping to hosts in its own LAN. So that establishes that it is not an issue with a firewall on the host preventing ping. So we need to investigate the possibility of a mistake in the gateway for the hosts. Would you post the output of ipconfig from at least one of the hosts in the LAN of r1?

HTH

Rick

HTH

Rick

brijendrasaini · ‎01-26-2017

Rich sir thank you.Sir can u please guide me as student i will do as you say i have to became like you.

Sir as per topology clients ip are as below :-

FastEthernet0 Connection:(default port)

Link-local IPv6 Address.........: FE80::2E0:B0FF:FE13:592B

IP Address......................: 10.10.30.2

Subnet Mask.....................: 255.0.0.0

Default Gateway.................: 10.10.30.1

We also able to ping serial interface of R1-193.200.200.1

Richard Burts · ‎01-26-2017

Brij

Thank you for the information confirming configuration of the gateway on the client. It is good that you can ping the serial interface. Can you ping the serial interface of the next router at 193.200.200.2?

HTH

Rick

HTH

Rick

brijendrasaini · ‎01-26-2017

rick sir,

i am able to ping every serial interface of each router :-

PC>ping 192.168.1.2

Pinging 192.168.1.2 with 32 bytes of data:

Reply from 192.168.1.2: bytes=32 time=29ms TTL=252

Reply from 192.168.1.2: bytes=32 time=37ms TTL=252

Reply from 192.168.1.2: bytes=32 time=3ms TTL=252

Reply from 192.168.1.2: bytes=32 time=4ms TTL=252

Ping statistics for 192.168.1.2:

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

Minimum = 3ms, Maximum = 37ms, Average = 18ms

PC>tracert 192.168.1.2 (r4 router--we trace from r1 lan clinets)

Tracing route to 192.168.1.2 over a maximum of 30 hops:

1 0 ms 0 ms 0 ms 10.10.30.1

2 0 ms 0 ms 0 ms 193.200.200.2

3 0 ms 1 ms 2 ms 194.200.210.2

4 1 ms 2 ms 2 ms 192.168.1.2

regards

Brijendra

Richard Burts · ‎01-26-2017

Brijendra

Thank you for the additional information. It is helpful to see that ping and tracert to the remote router are successful. In looking at the output of your route table from an earlier post I notice something that surprises me. This line of output

O 172.16.0.0/16 [110/65] via 193.200.200.2, 00:02:56, Serial1/0

I would have expected to see routes for the three subnets (172.16.30, 17216.31, 172.16.32) but see only the summary for 172.16.0.0. Can you post the configuration of OSPF from r2? (and perhaps from the other routers also might be helpful)

HTH

Rick

HTH

Rick

brijendrasaini · ‎01-26-2017

rick sir,

below data are from R2 :-

pithamput#show ip ospf da

pithamput#show ip ospf database

OSPF Router with ID (194.200.210.1) (Process ID 10)

Router Link States (Area 10)

Link ID ADV Router Age Seq# Checksum Link count

193.200.200.1 193.200.200.1 35 0x80000004 0x007d7b 3

194.200.210.1 194.200.210.1 35 0x80000006 0x005328 5

192.168.1.2 192.168.1.2 34 0x80000004 0x00b72d 3

194.200.210.2 194.200.210.2 34 0x80000006 0x00e44f 5

pithamput#show ip os

pithamput#show ip ospf n

pithamput#show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface

193.200.200.1 0 FULL/ - 00:00:30 193.200.200.1 Serial0/0

194.200.210.2 0 FULL/ - 00:00:36 194.200.210.2 Serial0/1

I configure with AREA 10 and process ID 10 With All routers

R2---Route information :-

O 10.0.0.0/8 [110/65] via 193.200.200.1, 00:02:33, Serial0/0

C 172.16.0.0/16 is directly connected, FastEthernet0/0

O 192.168.1.0/24 [110/128] via 194.200.210.2, 00:02:23, Serial0/1

C 193.200.200.0/24 is directly connected, Serial0/0

C 194.200.210.0/24 is directly connected, Serial0/1

--------------------------------------------------------------------------------------------------------R3-Route

O 10.0.0.0/8 [110/129] via 194.200.210.1, 00:02:58, Serial0/0
C 172.16.0.0/16 is directly connected, FastEthernet0/0
C 192.168.1.0/24 is directly connected, Serial0/1
O 193.200.200.0/24 [110/128] via 194.200.210.1, 00:02:58, Serial0/0
C 194.200.210.0/24 is directly connected, Serial0/0

show ip ospf database

OSPF Router with ID (194.200.210.2) (Process ID 10)

Router Link States (Area 10)

Link ID ADV Router Age Seq# Checksum Link count

192.168.1.2 192.168.1.2 275 0x80000004 0x00b72d 3

194.200.210.2 194.200.210.2 274 0x80000006 0x00e44f 5

194.200.210.1 194.200.210.1 274 0x80000006 0x005328 5

193.200.200.1 193.200.200.1 275 0x80000004 0x007d7b 3

bombay#show ip ospf ne

bombay#show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface

194.200.210.1 0 FULL/ - 00:00:38 194.200.210.1 Serial0/0

192.168.1.2 0 FULL/ - 00:00:36 192.168.1.2 Serial0/1

---------------------------------------------------------------------------------------------------------R4- Route

O 10.0.0.0/8 [110/193] via 192.168.1.1, 00:03:40, Serial0/0
C 172.16.0.0/16 is directly connected, FastEthernet0/0
C 192.168.1.0/24 is directly connected, Serial0/0
O 193.200.200.0/24 [110/192] via 192.168.1.1, 00:03:40, Serial0/0
O 194.200.210.0/24 [110/128] via 192.168.1.1, 00:03:40, Serial0/0

kolkata#show ip ospf database

OSPF Router with ID (192.168.1.2) (Process ID 10)

Router Link States (Area 0)

Link ID ADV Router Age Seq# Checksum Link count

192.168.1.2 192.168.1.2 397 0x80000001 0x00b0da 0

Summary Net Link States (Area 0)

Link ID ADV Router Age Seq# Checksum

172.16.0.0 192.168.1.2 393 0x80000001 0x00ee46

192.168.1.0 192.168.1.2 373 0x80000002 0x002e19

194.200.210.0 192.168.1.2 373 0x80000003 0x000f03

193.200.200.0 192.168.1.2 373 0x80000004 0x000bd0

10.0.0.0 192.168.1.2 373 0x80000005 0x0071b1

Router Link States (Area 10)

Link ID ADV Router Age Seq# Checksum Link count

192.168.1.2 192.168.1.2 388 0x80000004 0x00b72d 3

193.200.200.1 193.200.200.1 388 0x80000004 0x007d7b 3

194.200.210.2 194.200.210.2 383 0x80000006 0x00e44f 5

194.200.210.1 194.200.210.1 383 0x80000006 0x005328 5

regards

brij

Richard Burts · ‎01-26-2017

brij

We are making progress. We do not have the complete answer yet but we are getting closer. What I find particularly interesting is this line of output from the route table

C 172.16.0.0/16 is directly connected, FastEthernet0/0

Each router that has this will consider 172.16.0.0 to be locally connected. I would have expected the locally connected to be 172.13.30.0 or 172.16.31.0, or 172.16.32.0.

As the next step in investigating this problem can you post the interface configuration for each of the LAN interfaces (FastEth0/0)?

HTH

Rick

HTH

Rick

brijendrasaini · ‎01-26-2017

Dear Rich Sir,

R1 Lan interface deatils :-

FastEthernet0/0 is up, line protocol is up (connected)

Internet address is 10.10.30.1/8

Broadcast address is 255.255.255.255

Address determined by setup command

MTU is 1500 bytes

Helper address is not set

Directed broadcast forwarding is disabled

Outgoing access list is not set

Inbound access list is not set

Proxy ARP is enabled

Security level is default

Split horizon is enabled

ICMP redirects are always sent

ICMP unreachables are always sent

ICMP mask replies are never sent

IP fast switching is disabled

IP fast switching on the same interface is disabled

IP Flow switching is disabled

IP Fast switching turbo vector

IP multicast fast switching is disabled

IP multicast distributed fast switching is disabled

Router Discovery is disabled

IP output packet accounting is disabled

IP access violation accounting is disabled

TCP/IP header compression is disabled

RTP/IP header compression is disabled

Probe proxy name replies are disabled

Policy routing is disabled

Network address translation is disabled

BGP Policy Mapping is disabled

Input features: MCI Check

WCCP Redirect outbound is disabled

WCCP Redirect inbound is disabled

WCCP Redirect exclude is disabled

============================================================

R2

pithamput#show ip interface fastEthernet 0/0

FastEthernet0/0 is up, line protocol is up (connected)

Internet address is 172.16.32.1/16

Broadcast address is 255.255.255.255

Address determined by setup command

MTU is 1500 bytes

Helper address is not set

Directed broadcast forwarding is disabled

Outgoing access list is not set

Inbound access list is not set

Proxy ARP is enabled

Security level is default

Split horizon is enabled

ICMP redirects are always sent

ICMP unreachables are always sent

ICMP mask replies are never sent

IP fast switching is disabled

IP fast switching on the same interface is disabled

IP Flow switching is disabled

IP Fast switching turbo vector

IP multicast fast switching is disabled

IP multicast distributed fast switching is disabled

Router Discovery is disabled

IP output packet accounting is disabled

IP access violation accounting is disabled

TCP/IP header compression is disabled

RTP/IP header compression is disabled

Probe proxy name replies are disabled

Policy routing is disabled

Network address translation is disabled

BGP Policy Mapping is disabled

Input features: MCI Check

WCCP Redirect outbound is disabled

WCCP Redirect inbound is disabled

WCCP Redirect exclude is disabled

=============================================================

r3

FastEthernet0/0 is up, line protocol is up (connected)

Internet address is 172.16.30.1/16

Broadcast address is 255.255.255.255

Address determined by setup command

MTU is 1500 bytes

Helper address is not set

Directed broadcast forwarding is disabled

Outgoing access list is not set

Inbound access list is not set

Proxy ARP is enabled

Security level is default

Split horizon is enabled

ICMP redirects are always sent

ICMP unreachables are always sent

ICMP mask replies are never sent

IP fast switching is disabled

IP fast switching on the same interface is disabled

IP Flow switching is disabled

IP Fast switching turbo vector

IP multicast fast switching is disabled

IP multicast distributed fast switching is disabled

Router Discovery is disabled

IP output packet accounting is disabled

IP access violation accounting is disabled

TCP/IP header compression is disabled

RTP/IP header compression is disabled

Probe proxy name replies are disabled

Policy routing is disabled

Network address translation is disabled

BGP Policy Mapping is disabled

Input features: MCI Check

WCCP Redirect outbound is disabled

WCCP Redirect inbound is disabled

WCCP Redirect exclude is disabled

=============================================================

R4

kolkata#show ip inter

kolkata#show ip interface fa

kolkata#show ip interface fastEthernet 0/0

FastEthernet0/0 is up, line protocol is up (connected)

Internet address is 172.16.31.1/16

Broadcast address is 255.255.255.255

Address determined by setup command

MTU is 1500 bytes

Helper address is not set

Directed broadcast forwarding is disabled

Outgoing access list is not set

Inbound access list is not set

Proxy ARP is enabled

Security level is default

Split horizon is enabled

ICMP redirects are always sent

ICMP unreachables are always sent

ICMP mask replies are never sent

IP fast switching is disabled

IP fast switching on the same interface is disabled

IP Flow switching is disabled

IP Fast switching turbo vector

IP multicast fast switching is disabled

IP multicast distributed fast switching is disabled

Router Discovery is disabled

Brij

Richard Burts · ‎01-31-2017

Brij

Thank you for the additional information. It does show what is causing your issue. The mask used for the LAN interfaces is not correct. Here is what is on r2. r3 and r4 are similar.

Internet address is 172.16.32.1/16

So each of the routers believes that it is connected to network 172.16.0.0/16. So when r2 receives an OSPF advertisement from r3 for 172.16.0.0 it believes that it already has that network as a connected network and it does not put the network from r3 (or from r4) into its routing table. If you make the mask on the interface into 255.255.255.0 then things should work as you expect.

HTH

Rick

HTH

Rick

Not able to ping Clients