Guide: Configuring a Cisco router for BT Ultrafast Broadband (FTTP) – Configuration Only

Disclaimer: In no event will I be liable for any loss or damage including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from loss of data or profits arising out of, or in connection with, the use of this guide. Please ensure you read the full disclaimer before proceeding . By proceeding you confirm you have read and agree to these terms.

PLEASE READ BEFORE CONTINUING:

If you are a home user; Reconsider using Cisco as a manufacturer for your router. I cannot recommend Cisco at this time If you’re buying a second hand router. This is due to the new requirement for Cisco Smart licensing which makes it almost impossible to get the correct licenses and support applied to your router if you purchased it second hand.

This is the configuration only guide for configuring a Cisco C1100 series ISR for BT Ultrafast 2 Broadband including IPv6 and BT TV / Youview. The purpose of this post is to list the commands required to configure the device to be used as a reference. The full guide with the commands explained can be found here.

For reference VLAN 1 represents any internal VLANs you have and VLAN 2 represents the Youview IPTV VLAN. Interface GigabitEthernet0/1/0 represents where the Youview box is patched. This is not a complete list of commands required to configure the device; Just the relevant commands.

Configuration:

 ip dhcp excluded-address 192.168.1.1
 !
 ip dhcp pool VL1_LAN
  network 192.168.1.0 255.255.255.0
  dns-server 8.8.8.8 8.8.4.4
  default-router 192.168.1.1
  lease 0 8
 !
 ipv6 source-route
 ipv6 unicast-routing
 ipv6 dhcp pool IPv6
  dns-server 2001:4860:4860::8888
  dns-server 2001:4860:4860::8844
 !
 no cdp run
 !
 class-map type inspect match-any ICMPv6-inbound
   match access-group name ICMPv6-in
  class-map type inspect match-any ICMPv6-outbound
   match access-group name ICMPv6-out
 !
  class-map type inspect match-any IP-outbound
   match protocol udp
   match protocol tcp
 !
  class-map type inspect match-any ICMPv4-outbound
   match protocol icmp
 !
  policy-map type inspect ToInternet
   class type inspect IP-outbound
    inspect
   class type inspect ICMPv6-outbound
    pass
   class type inspect ICMPv4-outbound
    inspect
   class class-default
    drop
 !
  policy-map type inspect FromInternet
   class type inspect ICMPv6-inbound
    pass
   class class-default
    drop
 !
 zone security inside
 zone security outside
 zone security BTTV
 zone-pair security BTTV-->outside source BTTV destination outside
  service-policy type inspect ToInternet
 zone-pair security inside-->outside source inside destination outside
  service-policy type inspect ToInternet
 zone-pair security outside-->BTTV source outside destination BTTV
  service-policy type inspect FromInternet
 zone-pair security outside-->inside source outside destination inside
  service-policy type inspect FromInternet
 !
 interface GigabitEthernet0/0/0
  description WAN - FTTP Uplink
  no ip address
  no ip redirects
  no ip unreachables
  no ip proxy-arp
  zone-member security outside
  negotiation auto
  no cdp enable
  pppoe enable group global
  pppoe-client dial-pool-number 1
  no mop enabled
 !
 interface Vlan1
  description VLAN1 LAN
  ip address 192.168.1.1 255.255.255.0
  no ip redirects
  no ip unreachables
  no ip proxy-arp
  ip nat inside
  zone-member security inside
  ipv6 address IP-V6 ::1:0:0:0:1/64
  ipv6 enable
  ipv6 nd other-config-flag
  ipv6 dhcp server IPv6
  no mop enabled
 !
 interface Vlan2
  description VLAN2 Youview
  ip address 172.16.0.1 255.255.255.252
  no ip redirects
  no ip unreachables
  no ip proxy-arp
  ip nat inside
  zone-member security BTTV
  no mop enabled
 !
 interface GigabitEthernet0/1/0
  description BT TV connection
  switchport access vlan 40
  switchport mode access
  no cdp enable
  spanning-tree portfast
 !
 interface Dialer1
  ip address negotiated
  no ip redirects
  no ip unreachables
  no ip proxy-arp
  ip nat outside
  zone-member security outside
  encapsulation ppp
  ip tcp adjust-mss 1452
  dialer pool 1
  no cdp enable
  ipv6 address IP-V6 ::1/64
  ipv6 enable
  ipv6 dhcp client pd IP-V6 rapid-commit
  ppp mtu adaptive
  ppp authentication chap callin
  ppp chap hostname bthomehub@btbroadband.com
  ppp chap password 7 030A541F140A3059471B1C01
  ppp ipcp dns request
  ppp ipcp route default
 !
 ip nat inside source list Internet-Permitted interface Dialer1 overload
 ip forward-protocol nd
 !
 ip access-list standard Internet-Permitted
  remark == Permit NAT for Internet Access ==
  permit 192.168.1.0 0.0.0.255
  permit 172.16.0.0 0.0.0.3
 ip access-list standard NTP
  remark == Permit NTP clients == 
  permit 10.0.0.0 0.255.255.255
  deny   any
 ip access-list standard SNMPv3
  remark == Permit SNMP monitor == 
  permit 192.168.0.0 0.0.0.255
  deny   any
 ip access-list standard SSH
  remark == Permit SSH access == 
  permit 192.168.0.0 0.0.0.255
  deny   any
 !
 ipv6 route ::/0 Dialer1
 !
 ipv6 access-list ICMPv6-in
  permit icmp any any echo-reply
  permit icmp any any echo-request
  permit icmp any any no-route
  permit icmp any any packet-too-big
  permit icmp any any hop-limit
  permit icmp any any header
  permit icmp any any next-header
  permit icmp any any parameter-option
  permit icmp any any time-exceeded
  deny ipv6 any any
 !
 ipv6 access-list ICMPv6-out
  permit icmp any any nd-na
  permit icmp any any nd-ns
  permit ipv6 any any
 !
 line vty 0 15
  access-class SSH in
  transport input ssh
 line vty 5 15
  access-class SSH in
  transport input ssh
 !
 ntp source Dialer1
 ntp access-group query-only NTP
 ntp master 2
 ntp server 194.80.204.184
 ntp server 195.219.205.9
 ntp server 178.62.250.107
 ntp server 178.79.155.116 prefer
 !
 !
 !
 !
 !
 end

In addition to the configuration the following settings are required on the youview box.

IP Address:      172.16.0.2
Subnet mask:     255.255.255.252
Gateway:         172.16.0.1
Primary DNS:     62.6.40.178   
Secondary DNS:   62.6.40.162 

You will also need to physically bridge the following interfaces with a dumb switch that won’t interfere with the traffic flow:

1 The BT ONT
2 The WAN port of the ISR (Gi0/0/0 above)
3 The LAN port for the IPTV VLAN (Gi0/1/0 above)
4 The Youview IPTV box

I can confirm that a Netgear GS305 works for this purpose.

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2 thoughts to “Guide: Configuring a Cisco router for BT Ultrafast Broadband (FTTP) – Configuration Only”

  1. Hello,

    Great blog, I quite fancy a Cisco C1100 series ISR to do as you have.

    Is your model the Cisco ISR 1100 from Ebuyer (QuickFind: 865132), £235 ish???

    Keen not to get the wrong one.

    Thanks

    1. No. This looks like it’s the POE module for the ISR1100-8P with the 150 Watt power supply. To my knowledge the module is not user-serviceable either and needs to be ordered at the same time as the router itself. Expect to pay £3-500 for a used C1100-8P on eBay. The C1100-4P can be found cheaper as it has fewer ethernet ports however it has less throughput.

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