need help connecting

lildeezul

Ok i set my computer up with of 192.168.0.137 static ip address. and the subnetmask is 255.255.255.0 well if i change my subnetmask to 255.255.255.224 or anything other
than 255.255.255.0 i cannot connect to the internet. well what is the valid host that i can
assign my router so that i can be able to connect it ( ping it)

i did 192.168.0.138 255.255.255.0 but the ping failed. can anyone help me .

can i use that subnetmask with my router, what ip address with this subnetmask can
i use so that i can ping my comp

lildeezul

i was thinking the valid host are 192.168.0.1- 192.168.0.254

EdTheLad

The important thing you must consider is the ip address of the default gateway.You must be on the same logical subnet as the local default gateway to be able to access the internet.
You are using an ip address 192.168.0.137 imagine the default-gateway is 192.168.0.1, if you use a mask 255.255.255.224 you are putting your pc in a different subnet than the gateway.The address
192.168.0.137 255.255.255.224 can communicate with devices withthe following range
192.168.0.129 -> 192.168.0.159, since the gateway is not within the subnet you cannot ping it.This is why you must be careful about what mask you use.

lildeezul

oh i see ok.. so my computer IP address has to be valid with the defualt gateway. i see

but i set my router for 192.168.0.138 255.255.255.0 since there are 254 bits, no subnets, should it able to communicate. but it wont ping my nic for some reason


is there anyway to change my defualt gateway??

EdTheLad

Supply the information, router ip address and mask, pc ip address and mask.Subnets networks there all the same, you must have the devices in the appropriate ip address range to be able to communicate on a directly attached interface.

vjsousa

The default gateway is the router located on the same segment as your workstation. Does your computer have an ARP entry for the default gateway? To change the default gateway IP address, you need to do this from interface configuration mode on the router.

lildeezul

m router Ip address is 192.168.0.138 and the subnet mask is 255.255.255.0

my computers ip address is 192.168.0.137 and the subnetmask is 255.255.255.0

my defualt gateway is 192.168.0.1


and since the subnetmask 255.255.255.0 (/24) provides 254 host, then they are all in the same 1 subnet, and should be able to talk to each other. my for some reason my router cant ping my NIC

lildeezul

take a look at this 2611_D>sh interface
Ethernet0/0 is up, line protocol is up
Hardware is AmdP2, address is 0002.169c.1c60 (bia 0002.169c.1c60)
Description: connected to LAN1
Internet address is 192.168.0.138/24
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliablility 137/255, 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 00:00:05, output 00:00:08, 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 1000 bits/sec, 1 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
144 packets input, 15646 bytes, 0 no buffer
Received 142 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
11203 packets output, 682802 bytes, 0 underruns
11074 output errors, 0 collisions, 5 interface resets
0 babbles, 0 late collision, 0 deferred
11074 lost carrier, 0 no carrier
--More--



and look. I can ping from my NIC to router but i cant ping from Router to NIC
look...

611_D>ping 192.168.0.137

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.0.137, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

---

C:\Documents and Settings\Parish Powell>ping 192.168.0.138

Pinging 192.168.0.138 with 32 bytes of data:

Reply from 192.168.0.138: bytes=32 time=7ms TTL=255
Reply from 192.168.0.138: bytes=32 time=4ms TTL=255
Reply from 192.168.0.138: bytes=32 time=2ms TTL=255
Reply from 192.168.0.138: bytes=32 time=3ms TTL=255

Ping statistics for 192.168.0.138:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 2ms, Maximum = 7ms, Average = 4ms




you see i can ping my router from the comp, but i cant ping my router from my computer[/b]

vjsousa

So, you cannot ping the computer from the router? You state the default gateway is 192.168.0.1, but the Ethernet Interface is assigned 192.168.0.138. The router is your default gateway.

vjsousa

This IP 192.168.0.138 assigned to E0/0 is your default gateway.

vjsousa

Which interface is using this IP address 192.168.0.1? You need to check the configuration.

mikej412

The obvious question -- do you have firewall software on the PC?


Are you still connected back-to-back with a cross-over cable? Or are you now using straight through cables and a switch of some type?

If you are back-to-back, the gateway doesn't matter, since you have no one else to talk too anyway.

If you can ping from the PC to the router, but not the router to the PC.... are you sure about the PCs IP address?

Post the ipconfig from the PC

And ping the broadcast address for your network 192.168.0.255 -- and do a
show arp
and post that.

If you don't have the address on the PC wrong, and you see the resolution of you PCs IP to the MAC address..... then possibly a firewall issue on the PC.

lildeezul

Heres the Ipconfig.

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Network of Xircom CreditCard Etherne
t 10/100 + Modem 56
Physical Address. . . . . . . . . : 00-10-A4-B6-86-39
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.137
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 24.25.5.150
24.25.5.149

---

2611_D>sh arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.0.138 - 0002.169c.1c60 ARPA Ethernet0/0

lildeezul

OK this is what im tryin to do.


my computer Ip address and subnetmask can to be valid with the default gateway so it can communicate. Im tryin to set my router on the same valid network with the computer, that way i can ping the router, and after that i can plug in the INternet cable, and access it without reconfiguring the Ip address.

That is the big question! how can i access the internet statically, and ping the router, w/o changing ip address.


and i got both of them valid, so im wondering y it wont ping

larkspur

This is much easier than it looks.

please answer the following questions:

what node is 192.168.0.137?

what node is 192.168.0.138?

what node is 192.168.0.1?

what subnet masks are you using for:

node 192.168.0.137?

node 192.168.0.138?

node 192.168.0.1?

what does your topology look like ?


Also verify what mikj412 asked

The obvious question -- do you have firewall software on the PC?

lildeezul

laptop - 192.168.0.137
router ethernet 0/0 - 192.168.0.138
latop subnetmask - 255.255.255.0
router subnetmask - 255.255.255.0



in windows xp under network connection , then under TCP/IP properties the defualt gateway
says 192.168.0.1 ( this is where i can gettin my defualt gateway)


in order for me to access the internet my computer Ip address must be valid with 192.168.0.1

mikej412

lildeezul wrote:

in order for me to access the internet my computer Ip address must be valid with 192.168.0.1

So this means you are no longer "back-to-back" with a cross-over cable?

You haven't told us the new topology.

You haven't told us what the 192.168.0.1 device is -- a broadband/cable/dsl router?

And you haven't told us if you have firewall software on your PC which may have prevented the PC from responding to the router pings.

Can the PC ping the gateway? Can the router ping the gateway?

lildeezul

yes it is a back to back connection w/ a cross over cable,


the 192.168.0.1 is a cable router.

no i have no firewall other than windows firewall.

the PC can ping the defualt gateway but my router cant.

lildeezul

i connect my pc to my cable router to connect to the internet.

and then i use a different cable to connect the router to the pc.
my pc can ping my defualt gateway but my cisco router cant.

when i connected my cable router to my cisco router using a patch cable i could
connect to my default gateway 80 % ping. so i guess if i use a crossover cable to connec the
router to my defualt gateway ill get 100 percent. I make a diagram.


so this is what im thinking will work.

connect my cisco router interface 0/1 to my cable routers port.
and my computer to my cable routers port. and connect my cisco router
etherner 0/0 to my computer

then ill think i can ping

mikej412

Which topology is it?

CableRouter------e0/1-2611-e0/0------PC

or

192.168.0.138                      192.168.0.1            192.168.0.137
       2611-------------CableRouterWithSwitchPorts?-----------PC
                                       |
                                       |
                                    internet

lildeezul

ok
Internet
l
l
192.168.0.137 (pc)

---

Cable Router
192.168.0.1
l
l
l
l
l
l
l
l
192.168.0.138 ( cisco Router)

(ethernet 0/0)




All i have connected it my cable router to my pc ( when i want to access the internet)

and i switch off from PC- to Cisco router, ethernet 0/0 ( when wanting to connect
cisco to Pc)

this is what im tryin to do ....... I am trying to setup my cable Router , Cisco router, my
Pc on the same network so they can communicate. im am tryin
to do this becuase, i want to be able to acceess the internet one minute, and then just change the cable so that the Cisco router and Pc is hooked up. and be able to communicate with each other. WITHOUT having me change the Ip address everytime.



Wat i was thinking is this........ Have my Cable router connected to my Cisco router's ethernet 0/1 and have my Pc connected to another port of the CAble router. and when im not using the
internet, have my Cisco router ethernet 0/0 to my PC.. that way my cisco router is connected with the defualt gateway, my comp is connected to the defualt gateway, and my Cisco router is connected to my computer. And if i assign those ip correctly, (255.255.255.0) then i should be able to access the internet, then access my cisco router without changine configurations.

would this work?

vjsousa

Your lab setup is very confusing. It seems to me that you don't understand on how to properly configure the network. If I were you, I would start from scratch and do one thing at a time. First setup your cisco network and test that out. Confirm connectivity using ping from your host to all interfaces. Than you can try the Internet connection.

vjsousa

Test this out. It is hard to tell you if this will work if you don't test it out first.

lildeezul

oops internet supposed to be over cable router ( 192.168.0.1)

mikej412

lildeezul wrote:

this is what im tryin to do ....... I am trying to setup my cable Router , Cisco router, my
Pc on the same network so they can communicate. im am tryin
to do this becuase, i want to be able to acceess the internet one minute, and then just change the cable so that the Cisco router and Pc is hooked up. and be able to communicate with each other. WITHOUT having me change the Ip address everytime.

So swapping cables....

one minutes you're

CableRouter------------------------PC
192.168.0.1                      192.168.0.137

Then you want swap cables -- the cross-over cable from the 2611 to the PC

2611xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxPC
192.168.0.138                    192.168.0.137

It sounds like you had that -- you could ping from the PC to the router.

The not being able to ping from the router to the PC is probably because of the firewall on the PC. You should be able to configure your router for telnet access and try to telnet to it from the PC when you are connected to it by the cross-over cable.

lildeezul wrote:

Have my Cable router connected to my Cisco router's ethernet 0/1 and have my Pc connected to another port of the CAble router.

So does that Cable Router have multiple built in switch ports? It sounds like this topology that I already posted and asked you about

192.168.0.138                      192.168.0.1            192.168.0.137
       2611-------------CableRouterWithSwitchPorts?-----------PC
                                       |
                                       |
                                    internet

If that's that case -- you don't need to swap cables. Configure the 2611 for telnet access, and build the rest of your lab off the 2nd ethernet port of the 2611.

lildeezul

ok t hanks mike i will try that

lildeezul

see this is what i dont get.

i have a cross over cable just from my ethernet 0/0 to my NIC, and i gave the ethernet 192.168.0.36 255.255.255.224, and my computer 192.168.0.35 255.255.255.224


i can ping my router by my rotuer cant ping me. my nic can ping the loopback, and its Ip address.

my router can ping its ip address, but it cant ping its loopback.

i have no firewall installed on my pc besides windows xp firewall

dtlokee

Windows XP firewall will drop all icmp echo requests (ping). Turn it off and see what happens

lildeezul

yep it worked. but what about my sercuity???

r_durant

You can turn the XP firewall back on, but allow pings...but since pings are basically for troubleshooting and you know now that you can communicate, you can just turn the firewall back on and turn it off when you are troubleshooting again...

Netstudent

Go to the Advanced tab of your XP firewall to configure ICMP exceptions. If you turn your firewall off, make sure you disconnect from the internet.