dslreports logo
 
    All Forums Hot Topics Gallery
spc
Search similar:


uniqs
1111

Patrick_
@95.113.239.x

Patrick_

Anon

[Config] Can't find error in configuration uBR7246VXR (UBR7200-NPE-G1) V12.3

Hello,

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

anon5551212
@69.21.98.x

anon5551212

Anon

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.


SimplePanda
BSD
Premium Member
join:2003-09-22
Montreal, QC

SimplePanda to Patrick_

Premium Member

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?
cramer
Premium Member
join:2007-04-10
Raleigh, NC
Westell 6100
Cisco PIX 501

cramer to Patrick_

Premium Member

to Patrick_
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.

SimplePanda
BSD
Premium Member
join:2003-09-22
Montreal, QC

SimplePanda

Premium Member

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?

battleop
join:2005-09-28
00000

battleop

Member

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.
cramer
Premium Member
join:2007-04-10
Raleigh, NC

cramer

Premium Member

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.

Patrick_
@95.113.239.x

Patrick_ to SimplePanda

Anon

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
Patrick_

Patrick_

Anon

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
HELLFIRE
MVM
join:2009-11-25

HELLFIRE to Patrick_

MVM

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

tubbynet
reminds me of the danse russe
MVM
join:2008-01-16
Gilbert, AZ

tubbynet

MVM

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.

Patrick_
@95.114.76.x

Patrick_ to HELLFIRE

Anon

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:

Anon12345
@69.21.98.x

Anon12345 to HELLFIRE

Anon

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

Patrick_
join:2014-12-18

Patrick_

Member

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!
cramer
Premium Member
join:2007-04-10
Raleigh, NC

cramer to Anon12345

Premium Member

to Anon12345
He should also remove the help-address if he intends the cmts to be the dhcp server.
HELLFIRE
MVM
join:2009-11-25

HELLFIRE to Patrick_

MVM

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 See Profile

Happy playing OP!

Regards