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Changing bandwidth on leased line router

shoebwk
Level 1
Level 1

I have 1711 router connected to internet on 128Kbps. Recently we upgraded our line to 512K. After that i couldnot connect to the internet. Do i need to change anything in the router, like specify the 512k bandwidth, what are the commands

regards

shoeb

7 Replies 7

nkumar2005
Level 1
Level 1

did you change the ISP

did the ISP change any of his DNS server IP for you

then you need to do the changes in the router.

usually the ISP may change the IP address and the DNS server IPs when you upgrade so please check with them first before doing any changes in the router.

there is no need for you to put any bandwidth command for now.

Kevin Dorrell
Level 10
Level 10

Normally you should not need to change anything. The bandwidth command affects the calculations for routing protocols and traffic management, but should not affect the basic running of the router.

How are you connecting the line into the 1711 router? Is it through the fixed Ethernet port? I see that the 1711 does not have any WAN ports except the analog modem.

Could you do a show int for the Internet interface on the router and post the results?

Kevin Dorrell

Luxembourg

No i havent change the ISP and i am sure they have not changed any DNS. I can ping the internet site form inside the router. In upgrade the ISP changed the Analog modem, thats it.

My gateway is a firewall in clusture. things were working fine 1 hr back on old 128K

the output of Sh Int S0 is

----------------------------------------------

Serial0 is up, line protocol is up

Hardware is PowerQUICC Serial

Internet address is 213.42.36.xx/30

MTU 1500 bytes, BW 512 Kbit, DLY 20000 usec,

reliability 255/255, txload 2/255, rxload 1/255

Encapsulation PPP, LCP Open

Open: CDPCP, IPCP, loopback not set

Last input 00:00:00, output 00:00:00, output hang never

Last clearing of "show interface" counters 00:00:59

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 0 bits/sec, 1 packets/sec

5 minute output rate 5000 bits/sec, 5 packets/sec

98 packets input, 5329 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

1 input errors, 0 CRC, 1 frame, 0 overrun, 0 ignored, 0 abort

195 packets output, 39900 bytes, 0 underruns

0 output errors, 0 collisions, 2 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

DCD=up DSR=up DTR=up RTS=up CTS=up

----------------------------------------------------

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

My Router Output is

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

Current configuration : 617 bytes

!

version 12.3

service timestamps debug datetime msec

service timestamps log datetime msec

service password-encryption

!

hostname xxxxxxx

!

enable secret xxx.

!

ip subnet-zero

!

!

ip name-server 213.42.20.20

!

!

!

!

!

interface FastEthernet0

ip address 213.42.43.X 255.255.255.240

speed auto

!

interface Serial0

bandwidth 512

ip address 213.42.36.Y 255.255.255.252

encapsulation ppp

no fair-queue

!

ip classless

ip route 0.0.0.0 0.0.0.0 Serial0

no ip http server

!

!

line con 0

password xxx

login

line aux 0

line vty 0 4

password xxx

login

!

!

end

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

Shoeb,

Interface stats and config seems to be fine and it does not indicate any problem except that we rae not getting any input traffic on the serial 0 interface.

Could you please do a traceroute to any outside IP and see where it is dropping. Also try to shut/ no shut the interface along with a reboot of your modem.Try to get in confrence with ISP and trubleshoot it online with them.

HTH,

-amit singh

i did the traceroute and this is the result

Tracing the route to google.com (216.239.37.99)

1 213.42.36.xx 12 msec 8 msec 4 msec

2 195.229.244.122 4 msec 8 msec 8 msec

3 194.170.2.109 8 msec 12 msec 20 msec

4 auh-rb.ge-630.emix.net.ae (195.229.31.35) 12 msec 12 msec 24 msec

5 195.229.0.194 212 msec

195.229.0.202 212 msec 212 msec

6 so-3-0-3.cr1.lga3.us.mfnx.net (208.184.102.10) 208 msec 208 msec 208 msec

7 so-4-0-0.mpr1.lga1.us.above.net (64.125.30.17) 208 msec 216 msec 212 msec

8 so-3-0-0.cr2.lga1.us.above.net (64.125.27.149) 208 msec 212 msec 212 msec

9 so-1-0-0.mpr2.iad1.us.above.net (64.125.28.65) 216 msec 212 msec 228 msec

10 so-3-0-0.mpr2.iad5.us.above.net (64.125.28.14) 212 msec 212 msec 212 msec

11 216.200.151.110.available.above.net (216.200.151.110) 216 msec 216 msec 216

msec

12 216.239.46.246 212 msec 228 msec 212 msec

13 216.239.48.110 216 msec 220 msec 224 msec

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hi kumar here

1: ping 213.42.43.X from a system if ok

2: then ping 213.42.36.Y from a system if ok then

3: ping 213.42.36.Y+1 ( ISP side IP )from a system if ok then

4: ping 213.42.20.20 from a system if ok then

5:then ping cisco.com if ok start browsing

do the same from the router also and give me a feedback

thanks

Hi Shoebwk,

There seems to be issue with your ISP routing, since there is no input traffic from your ISP side. Also confirm if you have changed the speed/clock setting in your modem also.

Regards

Gaurav

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