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Patrick_
Anon
2014-Dec-17 2:32 pm
[Config] Can't find error in configuration uBR7246VXR (UBR7200-NPE-G1) V12.3Hello,
i am having problems setting up the ip route for the cable modems to reach the internet.
The interface cable 3/0 is supposed to connect to GigabitEthernet0/3
On the uBR i can ping the cable modems and ping the internet...
Can someone help? I'm stuck and absolutely don't see the problem...
! version 12.3 no service pad service timestamps debug uptime service timestamps log uptime no service password-encryption service compress-config service udp-small-servers max-servers 500 ! hostname Cmts ! boot-start-marker boot system slot0: boot-end-marker ! logging buffered 100000 debugging enable secret 5 $1$K8Ds$3B5FUo/vEUTUKa/xY4RBa/ enable password cable ! cable admission-control preempt priority-voice no cable qos permission create no cable qos permission update cable qos permission modems cable time-server ! cable config-file disable.cm access-denied service-class 1 max-upstream 1 service-class 1 max-downstream 1600 cpe max 1 timestamp ! cable config-file platinum.cm service-class 1 max-upstream 600 service-class 1 guaranteed-upstream 10 service-class 1 max-downstream 10000 service-class 1 max-burst 1600 cpe max 6 timestamp ! no aaa new-model ip subnet-zero ! ! ip cef no ip domain lookup ip dhcp excluded-address 10.128.1.1 10.128.1.15 ip dhcp excluded-address 10.254.1.1 10.254.1.15 ip dhcp ping packets 1 ! ip dhcp pool CableModems network 10.128.1.0 255.255.255.0 bootfile platinum.cm next-server 10.128.1.1 default-router 10.128.1.1 option 128 ip 10.128.1.1 option 4 ip 10.128.1.1 option 2 hex ffff.8f80 option 11 ip 10.128.1.1 option 10 ip 10.128.1.1 lease 1 0 10 ! ip dhcp pool hosts network 10.254.1.0 255.255.255.0 next-server 10.254.1.1 default-router 10.254.1.1 dns-server 10.254.1.1 10.128.1.1 domain-name cisco.com lease 1 0 10 ! ! key chain PfR_DM key 1 key-string PfR_DM username paa privilege 15 secret 5 $1$98Cj$ykEPyJCBth/YEP0EBb4bX. ! ! ip tcp synwait-time 5 ! ! ! ! interface GigabitEthernet0/1 ip address 10.10.10.1 255.255.255.248 no ip mroute-cache duplex auto speed auto media-type rj45 negotiation auto no cdp enable ! interface GigabitEthernet0/2 ip address 172.60.30.5 255.255.255.192 no ip mroute-cache duplex auto speed auto media-type rj45 negotiation auto no cdp enable ! interface GigabitEthernet0/3 ip address dhcp no ip mroute-cache duplex auto speed auto media-type rj45 negotiation auto no cdp enable ! interface Cable3/0 no ip address no cable packet-cache cable bundle 1 cable downstream channel-id 1 cable downstream annex A cable downstream modulation 256qam cable downstream frequency 546000000 no cable downstream rf-shutdown cable downstream rf-power 60 cable upstream max-ports 4 cable upstream 0 connector 0 cable upstream 0 frequency 61800000 cable upstream 0 ingress-noise-cancellation 200 cable upstream 0 docsis-mode atdma cable upstream 0 channel-width 3200000 3200000 cable upstream 0 minislot-size 2 cable upstream 0 power-level 0 cable upstream 0 range-backoff 3 6 cable upstream 0 modulation-profile 241 no cable upstream 0 shutdown cable upstream 1 connector 1 cable upstream 1 frequency 49000000 cable upstream 1 ingress-noise-cancellation 200 cable upstream 1 docsis-mode atdma cable upstream 1 channel-width 3200000 3200000 cable upstream 1 minislot-size 2 cable upstream 1 power-level 0 cable upstream 1 range-backoff 3 6 cable upstream 1 modulation-profile 241 no cable upstream 1 shutdown cable upstream 2 connector 2 cable upstream 2 frequency 36200000 cable upstream 2 ingress-noise-cancellation 200 cable upstream 2 docsis-mode atdma cable upstream 2 channel-width 3200000 3200000 cable upstream 2 minislot-size 2 cable upstream 2 power-level 0 cable upstream 2 range-backoff 3 6 cable upstream 2 modulation-profile 241 no cable upstream 2 shutdown cable upstream 3 connector 3 cable upstream 3 frequency 23400000 cable upstream 3 ingress-noise-cancellation 200 cable upstream 3 docsis-mode atdma cable upstream 3 channel-width 3200000 3200000 cable upstream 3 minislot-size 2 cable upstream 3 power-level 0 cable upstream 3 range-backoff 3 6 cable upstream 3 modulation-profile 241 no cable upstream 3 shutdown ! interface Cable3/1 no ip address no cable packet-cache cable bundle 1 cable downstream channel-id 2 cable downstream annex A cable downstream modulation 256qam cable downstream frequency 554000000 no cable downstream rf-shutdown cable downstream rf-power 60 cable upstream max-ports 4 cable upstream 0 connector 4 cable upstream 0 frequency 55400000 cable upstream 0 ingress-noise-cancellation 200 cable upstream 0 docsis-mode atdma cable upstream 0 channel-width 3200000 3200000 cable upstream 0 minislot-size 2 cable upstream 0 power-level 0 cable upstream 0 range-backoff 3 6 cable upstream 0 modulation-profile 241 no cable upstream 0 shutdown cable upstream 1 connector 5 cable upstream 1 frequency 42600000 cable upstream 1 ingress-noise-cancellation 200 cable upstream 1 docsis-mode atdma cable upstream 1 channel-width 3200000 3200000 cable upstream 1 minislot-size 2 cable upstream 1 power-level 0 cable upstream 1 range-backoff 3 6 cable upstream 1 modulation-profile 241 no cable upstream 1 shutdown cable upstream 2 connector 6 cable upstream 2 frequency 29800000 cable upstream 2 ingress-noise-cancellation 200 cable upstream 2 docsis-mode atdma cable upstream 2 channel-width 3200000 3200000 cable upstream 2 minislot-size 2 cable upstream 2 power-level 0 cable upstream 2 range-backoff 3 6 cable upstream 2 modulation-profile 241 no cable upstream 2 shutdown cable upstream 3 connector 7 cable upstream 3 frequency 17000000 cable upstream 3 ingress-noise-cancellation 200 cable upstream 3 docsis-mode atdma cable upstream 3 channel-width 3200000 3200000 cable upstream 3 minislot-size 2 cable upstream 3 power-level 0 cable upstream 3 range-backoff 3 6 cable upstream 3 modulation-profile 241 no cable upstream 3 shutdown ! interface Bundle1 ip address 10.254.1.1 255.255.255.0 secondary ip address 10.128.1.1 255.255.255.0 ip helper-address 192.168.178.1 cable arp filter request-send 3 2 cable arp filter reply-accept 3 2 cable source-verify dhcp cable dhcp-giaddr policy ! ip classless no ip forward-protocol udp netbios-ns ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/3 ip http server ip http authentication local ip http secure-server ip http timeout-policy idle 60 life 86400 requests 10000 ! ! cdp run ! cpd cr-id 1 nls resp-timeout 1 snmp-server engineID local 00000009020000E01ED77E40 ! alias exec scm show cable modem alias exec scf show cable flap alias exec scp show cable qos profile ! line con 0 exec-timeout 0 0 stopbits 1 line aux 0 stopbits 1 line vty 0 4 privilege level 15 password letmein login local transport input telnet ssh line vty 5 15 privilege level 15 password letmein login local transport input telnet ssh ! scheduler allocate 4000 400 ntp clock-period 17179977 ntp update-calendar ntp server 172.16.135.51 end
show cable modem
MAC Address IP Address I/F MAC Prim RxPwr Timing Num BPI State Sid (dBmV) Offset CPE Enb 2465.1117.6823 10.128.1.16 C3/0/U2 online 1 0.50 311 1 N 2465.1119.839f 10.128.1.17 C3/0/U2 online 2 0.00 291 1 N 9cc7.a686.2360 10.128.1.18 C3/0/U0 online 3 0.00 291 1 N
show cable bundle 1 forwarding -table
MAC address Interface Flags Location link sublink 9cc7.a686.235d Cable3/0 0 63C982F8 0 0 9cc7.a686.2360 Cable3/0 0 63C982B0 0 0 2465.1117.6823 Cable3/0 0 63C98280 0 0 2465.1117.6820 Cable3/0 0 63C982C8 0 0 2465.1119.839c Cable3/0 0 63C982E0 0 0 2465.1119.839f Cable3/0 0 63C98298 0 0 |
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anon5551212
Anon
2014-Dec-17 3:45 pm
Well, this may seem like a dumb observation, but does Gig0/3 have a public IP address. Assuming that it does, you can ping from the UBR to the internet because it's sourcing the traffic from an interface with a public IP address. Your cable modems are in private space, 10.128.1.x/24 and there is no NAT configuration in your configuration.
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SimplePandaBSD Premium Member join:2003-09-22 Montreal, QC |
to Patrick_
Alternatively, if Gig0/3 is receiving an RFC 1918 address from the DHCP server is the NAT that powers it aware of the 10.128.1.x addresses your cable customers are receiving? Specifically, is any NAT going on between the UBR and the public internet capable of NAT'ing for your cable modems as well? |
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cramer Premium Member join:2007-04-10 Raleigh, NC Westell 6100 Cisco PIX 501
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to Patrick_
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/3Do you know what that does? I don't think you do. (dhcp should be overriding it with an actual route to an ip address.) As others have said, this looks like a classic "I didn't setup NAT" problem. Also, 172.60... isn't a private address range. |
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SimplePandaBSD Premium Member join:2003-09-22 Montreal, QC |
said by cramer:ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/3
Do you know what that does? I don't think you do. (dhcp should be overriding it with an actual route to an ip address.)
As others have said, this looks like a classic "I didn't setup NAT" problem. Also, 172.60... isn't a private address range. Yeah, I was wondering if he is getting a 1918 address from that g0/3 port (that's using "ip address dhcp"). He's routing all to it, after all... Thinking "ip route 0.0.0.0 0.0.0.0 dhcp" is probably more suitable here re: the default route? |
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its been a long time since I've setup a cisco box to take its internet facing ip from DHCP. If you are taking it via DHCP you would not have an ip route 0.0.0.0 0.0.0.0 because the default rout would come via DHCP.
Also ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/3 only works reliably if G0/3 has a /30. On anything larger it's always been a hit or miss on a /29 or larger. |
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cramer Premium Member join:2007-04-10 Raleigh, NC |
cramer
Premium Member
2014-Dec-17 6:22 pm
That's proxy-arp. And it will only work if there's a partner on the link that will pretend to be the entire f'ing internet. Most sane network admin disable proxy-arp. |
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to SimplePanda
Tried the following, but it did not work.
ip nat inside source static 10.128.1.1 interface GigabitEthernet0/3
interface Bundle1 ip address 10.254.1.1 255.255.255.0 secondary ip address 10.128.1.1 255.255.255.0 ip nat inside ip pim dense-mode no cable arp filter request-send no cable arp filter reply-accept no cable arp no cable proxy-arp cable source-verify
interface GigabitEthernet0/3 ip address dhcp ip nat outside ip pim dense-mode no ip mroute-cache duplex auto speed auto media-type rj45 negotiation auto no cdp enable |
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Patrick_ |
Patrick_
Anon
2014-Dec-17 7:01 pm
GigabitEthernet0/3 gets from the external dhcp server 192.168.178.37 255.255.255.0 External dhcp server on 192.168.178.1 The Internet IP changing every 24 hours is: 95.113.239.95 |
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to Patrick_
Do us a favor and post us "show ver" (minus the chassis serial#) and "show inventory. The thing I'm having an issue wrapping my mind around is how "interface cable 3/0 is supposed to connect to GigabitEthernet0/3." Do you have a DOCSIS WIC card (layer 1 / 2) which then directs to Gi0/3 for the layer 3 connectivity?
May also help us understand what you're trying to do by diagraming out your layout.
Final question -- WHAT are you trying to do with this 7246VXR exactly? Home edge router?
My 00000010bits
Regards |
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tubbynetreminds me of the danse russe MVM join:2008-01-16 Gilbert, AZ |
hf -- its a ubr. the 7246 is basically a 7206 with the guts to make your cable modem work. its what many people call the 'cmts'.
q. |
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Patrick_ to HELLFIRE
Anon
2014-Dec-18 8:01 am
to HELLFIRE
At the moment I am trying to setup up a configuration for testing the over 20 used modems lying around. And later using the running system in a small cable system. But the cable modems just won't connect to the internet... :-( I don't know, but maybe the Arris C3 is really easier to setup?
IOS (tm) 7200 Software (UBR7200-IK8SU2-M), Version 12.3(23)BC2, RELEASE SOFTWARE (fc1) ROM: System Bootstrap, Version 12.2(8r)B, RELEASE SOFTWARE (fc1) BOOTLDR: Cisco IOS Software, 7200 Software (UBR7200-KBOOT-M), Version 12.2(33)SCD2, RELEASE SOFTWARE (fc1) System image file is "disk2:ubr7200-ik8su2-mz.123-23.BC2.bin" cisco uBR7246VXR (UBR7200-NPE-G1) processor (revision A) with 983040K/65536K bytes of memory. SB-1 CPU at 700MHz, Implementation 1, Rev 0.2, 512KB L2 Cache 6 slot VXR midplane, Version 2.0
Last reset from power-on Bridging software. X.25 software, Version 3.0.0.
PCI bus mb1 has 74 bandwidth points PCI bus mb2 has 0 bandwidth points
3 Gigabit Ethernet/IEEE 802.3 interface(s) 2 Cable Modem network interface(s) 509K bytes of non-volatile configuration memory.
250880K bytes of ATA PCMCIA card at slot 2 (Sector size 512 bytes). 16384K bytes of Flash internal SIMM (Sector size 256K). Configuration register is 0x2102
NAME: "Chassis", DESCR: "uBR7246VXR Universal Broadband Router" PID: UBR7246VXR , VID: N/A, SN:
NAME: "UBR7200-NPE-G1", DESCR: "NPE-G1 Card" PID: UBR7200-NPE-G1 , VID: N/A, SN:
NAME: "module 3", DESCR: "MC28U_F_connector" PID: UBR-MC28U , VID: V01 , SN: |
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Anon12345 to HELLFIRE
Anon
2014-Dec-18 3:42 pm
to HELLFIRE
Hellfire, his physical cable interfaces placed in bundle 1 and interface bundle 1 (virtual interface) is configured. ! interface Cable3/0 no ip address no cable packet-cache cable bundle 1 cable downstream channel-id 1 ... ! interface Cable3/1 no ip address no cable packet-cache cable bundle 1 ! interface Bundle1 ip address 10.254.1.1 255.255.255.0 secondary ip address 10.128.1.1 255.255.255.0 ip helper-address 192.168.178.1 cable arp filter request-send 3 2 cable arp filter reply-accept 3 2 cable source-verify dhcp cable dhcp-giaddr policy ! Patrick, try adding these. ! access-list 10 permit 10.128.1.0 0.0.0.255 access-list 10 permit 10.254.1.0 0.0.0.255 ! int bundle 1 ip nat inside ! int gig 0/3 ip nat outside ! ip nat inside source list 10 interface gig 0/3 overload ! no ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/3 ! said by HELLFIRE:Do us a favor and post us "show ver" (minus the chassis serial#) and "show inventory. The thing I'm having an issue wrapping my mind around is how "interface cable 3/0 is supposed to connect to GigabitEthernet0/3." Do you have a DOCSIS WIC card (layer 1 / 2) which then directs to Gi0/3 for the layer 3 connectivity?
May also help us understand what you're trying to do by diagraming out your layout.
Final question -- WHAT are you trying to do with this 7246VXR exactly? Home edge router?
My 00000010bits
Regards |
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Yes the following did it for me!!! access-list 10 permit 10.128.1.0 0.0.0.255 access-list 10 permit 10.254.1.0 0.0.0.255 ip nat inside source list 10 interface gig 0/3 overload You are my hero... Thank you all very much!!! Have a nice Christmas and all the best. I am glad at last that it is running now! |
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cramer Premium Member join:2007-04-10 Raleigh, NC |
to Anon12345
He should also remove the help-address if he intends the cmts to be the dhcp server. |
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to Patrick_
said by tubbynet:hf -- its a ubr. the 7246 is basically a 7206 with the guts to make your cable modem work. its what many people call the 'cmts'. Ahh... thanks for clarifying the "WTF?!" moment I was having cramer Happy playing OP! Regards |
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