ubr924 modem does not want to talk through its ethernet0 port

I have here one of those ubr924 cable modems and was going to configure it so I could connect it to my switch and then tftp new OS to it. I thought that would be an easy task:

o Connect the router's hub port to the switch using a crossover cable. cable-modem0 is not connected to anything for the time being. o Using the console cable, configure the modem:

! hostname burpmaster ! ! clock timezone EST -5 ip subnet-zero no ip routing ! ip audit notify log ip audit po max-events 100 call rsvp-sync ! interface Ethernet0 ip address 10.0.0.7 255.255.255.0 no ip route-cache bridge-group 59 bridge-group 59 spanning-disabled ! interface cable-modem0 no ip route-cache shutdown bridge-group 59 ! ip classless ip http server no ip http cable-monitor ! snmp-server enable traps tty snmp-server manager ! voice-port 0 input gain -2 output attenuation 0 ! voice-port 1 input gain -2 output attenuation 0 ! ! line con 0 line vty 0 4 ! scheduler max-task-time 5000 end

burpmaster# (yes, I did not put any passwords on it just yet)

o Check if Ethernet0 seems to be properly configured:

burpmaster#show interfaces e 0 Ethernet0 is up, line protocol is up Hardware is PQUICC Ethernet, address is 0003.6bbd.66f2 (bia

0003.6bbd.66f2) Internet address is 10.0.0.7/24 MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set ARP type: ARPA, ARP Timeout 04:00:00 Last input never, 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: fifo Output queue: 0/40 (size/max) 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 53 packets output, 5588 bytes, 0 underruns 0 output errors, 0 collisions, 1 interface resets 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out burpmaster#

o Ping itself:

burpmaster#ping 10.0.0.7

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.0.0.7, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms burpmaster#

So far so good, but this is when the fun begins:

burpmaster#ping 10.0.0.1

Reply to
Mauricio Tavares
Loading thread data ...

Hello,

Could you please try :

bridge irb interface ethernet0 no ip addr interface bvi 59 ip address 10.0.0.7 255.255.255.0 !

Christophe.

Reply to
Christophe Fillot

Christophe Fillot wrote:

Sure thing:

burpmaster>en burpmaster#conf t Enter configuration commands, one per line. End with CNTL/Z. burpmaster(config)#bridge irb burpmaster(config)#interface e 0 burpmaster(config-if)#no ip addr burpmaster(config-if)#interface bvi 59 burpmaster(config-if)#

133.CABLEMODEM.CISCO: 01:07:48: %LINEPROTO-5-UPDOWN: Line protocol on Interface BVI59, changed state to up burpmaster(config-if)#ip address 10.0.0.7 255.255.255.0 burpmaster(config-if)#^Z burpmaster# 133.CABLEMODEM.CISCO: 01:08:08: %SYS-5-CONFIG_I: Configured from console by console burpmaster#ping 10.0.0.7

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.0.0.7, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms burpmaster#ping 10.0.0.1

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.0.0.1, timeout is 2 seconds: ..... Success rate is 0 percent (0/5) burpmaster# burpmaster# show running-config Building configuration...

Current configuration : 830 bytes ! version 12.2 no service pad service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname burpmaster ! ! clock timezone EST -5 ip subnet-zero no ip routing ! ip audit notify log ip audit po max-events 100 call rsvp-sync ! ! ! ! ! ! bridge irb ! ! interface Ethernet0 no ip address no ip route-cache bridge-group 59 bridge-group 59 spanning-disabled ! interface cable-modem0 no ip route-cache shutdown bridge-group 59 bridge-group 59 spanning-disabled ! interface BVI59 ip address 10.0.0.7 255.255.255.0 ! ip classless ip http server no ip http cable-monitor ! snmp-server enable traps tty snmp-server manager ! voice-port 0 input gain -2 output attenuation 0 ! voice-port 1 input gain -2 output attenuation 0 ! ! line con 0 line vty 0 4 ! scheduler max-task-time 5000 end

burpmaster# burpmaster#show interfaces BVI59 is up, line protocol is up Hardware is BVI, address is 0003.6bbd.66f2 (bia 0000.0000.0000) Internet address is 10.0.0.7/24 MTU 1500 bytes, BW 10000 Kbit, DLY 5000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:01:44, output never, 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: fifo Output queue: 0/0 (size/max) 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 abort 11 packets output, 669 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 output buffer failures, 0 output buffers swapped out Ethernet0 is up, line protocol is up Hardware is PQUICC Ethernet, address is 0003.6bbd.66f2 (bia

0003.6bbd.66f2) MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set ARP type: ARPA, ARP Timeout 04:00:00 Last input 01:02:35, output 00:00:06, 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: fifo Output queue: 0/40 (size/max) 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 527 packets output, 50951 bytes, 0 underruns 0 output errors, 0 collisions, 1 interface resets 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out cable-modem0 is administratively down, line protocol is down Hardware is BCM3300, address is 0003.6bbd.66f3 (bia 0003.6bbd.66f3) Internet address will be negotiated using DHCP MTU 1500 bytes, BW 27000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation DOCSIS, loopback not set Keepalive set (10 sec) ARP type: ARPA, ARP Timeout 04:00:00 Last input never, output never, 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: fifo Output queue: 0/40 (size/max) 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 abort 0 packets output, 0 bytes, 0 underruns 0 output errors, 0 collisions, 1 interface resets 0 output buffer failures, 0 output buffers swapped out burpmaster#

BTW, switch reports the port this router is connected to as:

Fa0/21 connected 1 A-Half A-10 100BaseTX/FX

Reply to
Mauricio Tavares

Here is an update: it turned out the crossover cable was indeed boink. A new cable was put in place and then all was well once again.

Thanks for all the help! =)

Reply to
Mauricio Tavares

Cabling-Design.com Forums website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.