BGP Backdoor

 BGP Backdoor work with EBGP

Note:
1. The EBGP is by Default preferred routing path as compare to other routing Protocol.
2. BGP backdoor will preferred if we use the command BGP backdoor in BGP routing.
3. The BGP routing table should match with Network statement.
4. Summary route should not use. The recommended is use particuler route.
5. Other IGP routing will prefer if we use BGP backdoor command.
6. EIGRP is most usable in Backdoor (recommended). Some other open standard OSPF could have problem in some Cisco IOS , you have to check the cisco IOS compatibility.

7. Using my EIGRP Green link  for Backdoor network
----------------------------------------R1-------------------------------

router eigrp 100
 network 172.22.1.253 0.0.0.0
  network 10.10.10.128 0.0.0.3
 network 11.11.11.11 0.0.0.0
 redistribute static route-map ONK
!
router bgp 65001
 no synchronization
 bgp log-neighbor-changes

 network 10.10.11.0 mask 255.255.255.0

 network 172.23.3.64 mask 255.255.255.192 backdoor
 network 172.23.3.128 mask 255.255.255.128 backdoor
 network 172.25.94.0 mask 255.255.255.192
 network 172.31.102.1 mask 255.255.255.255
 neighbor 10.10.10.17 remote-as 10201
 neighbor 10.10.10.17 description  ISP-1 MPLS PE router
 neighbor 10.10.10.17 allowas-in
 neighbor 172.22.1.252 remote-as 65001
 neighbor 172.22.1.252 description 1841 IBGP Peer
 neighbor 172.22.1.252 next-hop-self

route-map ONK permit 10
 match ip address 16

access-list 16 permit 172.22.11.128 0.0.0.127
access-list 16 permit 172.22.18.0 0.0.0.127

-------------------------------------------------------
----------------------------R2-----------------------

 !
router eigrp 100
 network 10.10.10.128 0.0.0.3
 network 22.22.22.22 0.0.0.0
 network 172.22.1.252 0.0.0.0
 redistribute static route-map ONK
!
router bgp 65001
 no synchronization
 bgp log-neighbor-changes

 network 10.10.11.0 mask 255.255.255.0
 network 172.23.3.64 mask 255.255.255.192 backdoor
 network 172.23.3.128 mask 255.255.255.128 backdoor
 network 172.25.94.0 mask 255.255.255.192
 network 172.31.102.2 mask 255.255.255.255
 neighbor 172.22.1.253 remote-as 65001
 neighbor 172.22.1.253 description 2811 IBGP Peer
 neighbor 172.22.1.253 next-hop-self
 neighbor 172.34.87.185 remote-as 9730
 neighbor 172.34.87.185 description ISP-2 MPLS PE router
 neighbor 172.34.87.185 allowas-in
 no auto-summary

route-map ONK permit 10
 match ip address 16

access-list 16 permit 172.22.11.128 0.0.0.127
access-list 16 permit 172.22.18.0 0.0.0.127

----------------------------------R3----------------------------

router eigrp 100
 redistribute static route-map ONK
 network 33.33.33.33 0.0.0.0
 network 172.23.0.252 0.0.0.0
 no auto-summary
!
router bgp 65001
 no synchronization
 bgp log-neighbor-changes

 network 172.22.11.128 mask 255.255.255.128 backdoor
 network 172.22.18.0 mask 255.255.255.128 backdoor
 network 172.31.106.1 mask 255.255.255.255
 neighbor 10.0.0.5 remote-as 10201
 neighbor 10.0.0.5 description ISP-1 MPLS PE Router
 neighbor 10.0.0.5 allowas-in
 neighbor 172.23.0.253 remote-as 65001
 neighbor 172.23.0.253 description 2811 IBGP Peer
 neighbor 172.23.0.253 next-hop-self
 no auto-summary

route-map ONK permit 10
 match ip address 16

access-list 16 permit 172.23.3.64 0.0.0.63
access-list 16 permit 172.23.3.128 0.0.0.127

----------------------------------R4---------------

router eigrp 100
 network 10.10.10.128 0.0.0.3
 network 172.23.0.253 0.0.0.0
 redistribute static route-map ONK
!
router bgp 65001
 no synchronization
 bgp log-neighbor-changes
 network 3.8.8.8 mask 255.255.255.255
 network 172.22.11.128 mask 255.255.255.128 backdoor
 network 172.22.18.0 mask 255.255.255.128 backdoor

 network 172.23.88.0 mask 255.255.255.0
 network 172.31.106.1 mask 255.255.255.255
 neighbor 172.23.0.252 remote-as 65001
 neighbor 172.23.0.252 description 1841 IBGP Peer
 neighbor 172.23.0.252 next-hop-self
 neighbor 172.34.125.21 remote-as 9730
 neighbor 172.34.125.21 description ISP-2 MPLS PE router
 neighbor 172.34.125.21 allowas-in
 no auto-summary
!
route-map ONK permit 10
 match ip address 16
access-list 16 permit 172.23.3.64 0.0.0.63
access-list 16 permit 172.23.3.128 0.0.0.127
 match ip address 16
!


BGP Backdoor work with EBGP

Bandwith Links Speed E1 , STM , OC, DS

Bandwdith E1 links
E1 = 2 Mb/s
E2 = 8Mb/s
E3 = 34Mb/s
E4 = 140Mb/s
E5 = 565Mb/s

Bandwidth STM links

STM-1 = 155Mb/s
STM-4 = 622Mb/s
STM-16 = 2.5Gb/s
STM-64 = 10 Gb/s

Bandwidth OC Links
OC-1 = 51Mbps
OC-3 = 155Mbps
OC-12 = 600 Mbps
OC-48 = 2.4 Gbps
OC-96 = 9.6 Gbps
OC-768 = 40 Gbps


 Type                                         Rate                               Additional info


ISDN:

 

BRI                                        128Kbps                    ISDN 2 64KB+1 16KD

PRI                                        1.480Mbps                 ISDN 23B+1D (all 64K) ~ T1     Type                                      Rate                                    Additional info

XDSL:

 

ADSL                             640+Kbps up/             Asymmetric Digital SubscriberLine        

                                       1.544+Mbps down      Nonmatching send/receive transmission rates

HDSL                            784+Kbps                    Typically matching send/receive rates, can                     reach  T1 speeds

SDSL                             768Kbps                     Single Line Digital Subscriber Line aka HDSL2

VDSL                            19.2Mbps up/              Very high rate Digital Subscriber Line

                                      51.84Mbps down

IDSL                             128Kbps                      Effectively ISDN over low quality non-CAT5 copper
                                                                          with no voice capabilities
RADSL                         ADSL                          Rate Adaptive Digital Subscriber Line
                                                                         ADSL that automatically adapts rates depending on
                                                                         transmission medium quality 

Type                               Rate                                            Additional info


  T Carrier:
T1                        1.544Mbps                         24 DS0 channels, equivalent to 1 DS1
T1C                     3.152Mbps                         48 channels
T2                        6.312Mbps                          96 channels
T3                        44.736Mbps                       672 channels
T4                        274.176Mbs                        4032 channels
E1                        2.048Mbps                         30 64Kbps channels + 2 64Kbps D, aka European T1 
    Digital Signal Links

DS0                64Kbps                1 channel, same rate in NA, Japan, and Europe
DS1               1.544Mbps           24 channels (T
DS1C             3.152Mbps          48 channels (T1C)
DS2               6.312Mbps          96 channels (T2)
DS3              44.736Mbps         672 channels (T3)
DS4              274.176Mbps       4032 channels (T4) 
    Optical Carrier:
OC-1          51.48Mbps            Optical Carrier SONET - All OC-n are 51.48*n Mbps
OC-3          155.52Mbps          Optical Carrier SONET
OC-12        622.08Mbps          Optical Carrier SONET
OC-48         2.4Gbps                Optical Carrier SONET
OC-192       9.6Gbps                Optical Carrier SONET
OC-256      13.1Gbps               Optical Carrier SONET
OC-768      40Gbps                  Optical Carrier SONET

Connection                  Speed


56 K                        56,000 bps
128 K                     128,000 bps
256 K                     256,000 bps
512 K                     512,000 bps
768 K                     768,000 bps
T1, DS-1                   1.544 Mbps
T3, DS-3                   44.736 Mbps
OC-3                        155.520 Mbps
OC-12                      622.080 Mbps
OC-48                       2.488 Gbps
OC-192                       10 Gbps  
         

SRST Config on Gatway Router

call-manager-fallback
max-conferences 8 gain -6
limit-dn 7910 1
limit-dn 7935 1
limit-dn 7940 2
limit-dn 7960 2
ip source-address 10.71.16.x port 2000 strict-match
max-ephones 24
max-dn 48
transfer-pattern 3...
transfer-pattern 4...
transfer-pattern 5
transfer-pattern 5...
transfer-pattern 1...
voicemail 17707307xxx
no huntstop
!

Dial Peer Voice on Gateway Router

dial-peer cor custom
!
dial-peer voice 100 voip
preference 1
destination-pattern [3,4,6]...$
progress_ind setup enable 3
session target ipv4:10.23.219.X
dtmf-relay h245-alphanumeric
codec g711ulaw
!
dial-peer voice 10 pots
translation-profile outgoing TranslateOutgoing
destination-pattern [2-9]..[2-9]......T
port 2/0/0:23
forward-digits all
!
dial-peer voice 7 pots
translation-profile outgoing TranslateOutgoing
destination-pattern [2-9]......T
port 2/0/0:23
forward-digits all
!
dial-peer voice 11 pots
translation-profile outgoing TranslateOutgoing
destination-pattern 1[2-9]..[2-9]......T
port 2/0/0:23
forward-digits all
!
dial-peer voice 911 pots
translation-profile outgoing TranslateOutgoing
destination-pattern 911
incoming called-number .
direct-inward-dial
port 2/0/0:23
forward-digits all
!
dial-peer voice 20 pots
translation-profile outgoing TranslateOutgoing
destination-pattern 011T
port 2/0/0:23
forward-digits all
!
dial-peer voice 200 voip
preference 2 destination-pattern [3,4,6]...$
progress_ind setup enable 3
session target ipv4:10.23.220.x
dtmf-relay h245-alphanumeric
codec g711ulaw
!
!
gateway
timer receive-rtp 1200
!

Voice Controler Card Configuration US Standard

controller T1 0/0/0
framing esf
linecode b8zs
pri-group timeslots 1-24
!
interface Serial0/0/0:23
no ip address
isdn switch-type primary-dms100
isdn incoming-voice voice
isdn map address . plan isdn type national
no cdp enable
!