Cisco 1941 with EHWIC-VA-DSL-M
Product codding
Cisco Multimode VDSL2 and ADSL2/2+ High-Speed WAN Interface Card
Product: EHWIC-VA-DSL-M Description: 1-port VDSL2/ADSL2+ EHWIC over POTS with Annex M Minimum IOS: 15.1(3)T VDSL2 (very high speed DSL) / Digital Subscriber Line / / EHWIC-VA-DSL-M \ \ \Annex M \ ADSL2/A2+ (asymmetric DSL) Enhanced High-Speed WAN Interface Card
#show inventory NAME: "CISCO1941/K9", DESCR: "CISCO1941/K9 chassis, Hw Serial#: FCZ012345JE, Hw Revision: 1.0" PID: CISCO1941/K9 , VID: V05 , SN: *********** NAME: "ADSL/VDSL over POTS Annex M supporting ADSL1, ADSL2, ADSL2+ and VDSL2 on Slot 0 SubSlot 1", DESCR: "ADSL/VDSL over POTS Annex M supporting ADSL1, ADSL2, ADSL2+ and VDSL2" PID: EHWIC-VA-DSL-M , VID: V01 , SN: ***********
- Current platform info at the boot
Cisco CISCO1941/K9 (revision 1.0) with 487424K/36864K bytes of memory. Processor board ID FCZ012345JE 1 DSL controller 1 Ethernet interface 2 Gigabit Ethernet interfaces 1 ATM interface 3 terminal lines 2 Cellular interfaces DRAM configuration is 64 bits wide with parity disabled. 255K bytes of non-volatile configuration memory. 250880K bytes of ATA System CompactFlash 0 (Read/Write)
LED explained
LED | Color | Description |
---|---|---|
EN | Green | Operating system is running. |
Amber | Interface card is resetting. | |
Blinking | System is initializing. | |
CD LED | Green | Lit when the unit is connected to the network and operating normally. On ADSL interface cards only, this LED blinks while training with DSLAMs. |
LP LED | Yellow | DSL interface is in loopback mode. |
Off | Normal operation. |
Config
! clean start by removing current config erase startup-config _or_ write erase reload
! initiate xDSL card, it's added automatically controller VDSL 0/1/0
o2 broadband configuration
o2 is one of this UK odd ISPs who is using RFC 1483 Bridge when providing ADSL2+ Internet access. Below are details provided by O2 and config build on this information.
ISP name: O2 Home Broadband Encapsulation: RFC 1483 Bridged Multiplexing method: LLC-Based VPI: 0 VCI: 101 Username: leave blank Password: leave blank Domain name: leave blank IP address type: this depends on whether you chose our static IP address option or not: If you didn't choose our static IP address option, set this to dynamic IP If you did choose our static IP address, enter the IP address printed in your welcome letter DNS servers: choose to get these dynamically from the Internet provider NAT: enable Primary DNS server: 87.194.255.155 Secondary DNS server: Leave blank If you have a static IP address, you should enter the following DNS server address: Primary DNS server: 87.194.255.154 My o2 box MAC address: 00-24-17-11-22-33
- A BVI (Bridged Virtual Interface)
- is a virtual interface that acts like a normal routed interface. A BVI does not support bridging but actually represents the corresponding bridge group to routed interfaces. The interface number is the link between the BVI and the bridge group. Think of the BVI as the default gateway to all the bridge interfaces, all local traffic is bridged between the bridge interfaces, but the traffic that is not local to the bridge group is routed via the BVI interface. Read more on Cisco Community
- Integrated Routing and Bridging
bridge irb
command enables Integrated Routing and Bridging, then sub-interface atm0/1/0.1 and gi0/0 belong to the same Bridge Group 1 having bothbridge-group 1
in their interface configurations. BVI1 (bridge virtual interface) is configured to represents both atm0/1/0.1 and gi0/0 interfaces when ip protocol is routed. Two lines at the bottombridge 1 protocol ieee
andbridge 1 route ip
define the Bridge Group 1 is using IEEE bridge protocol and routes IP protocol.
Below config is working with O2 as of 8th Oct 2013, public ip address is provided by ISP dhcp server. Please see sub-interface atm0/1/0.1 command ip address dhcp
therefore static ip route something like ip route 0.0.0.0 0.0.0.0 O2_gateway_ip
is excluded. Please think about both commands when configuring static IP address given by O2.
! Last configuration change at 22:20:24 UTC Mon Oct 7 2013 version 15.2 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname r1-basic ! boot-start-marker boot-end-marker ! ! enable secret cisco ! no aaa new-model ! ip cef ! ! ! ip dhcp excluded-address 10.0.0.1 10.0.0.10 ip dhcp excluded-address 10.255.255.1 10.255.255.254 ! ip dhcp pool LAN network 10.0.0.0 255.0.0.0 default-router 10.0.0.1 dns-server 87.194.255.155 10.0.0.1 domain-name lan.gateway lease 0 2 ! ! ! no ip domain lookup no ipv6 cef multilink bundle-name authenticated ! ! ! license udi pid CISCO1941/K9 sn ********** license accept end user agreement license boot module c1900 technology-package securityk9 disable license boot module c1900 technology-package datak9 disable ! ! ! ! controller Cellular 0/0 ! controller VDSL 0/1/0 ! bridge irb ! ! ! ! interface Embedded-Service-Engine0/0 no ip address shutdown ! interface GigabitEthernet0/0 no ip address ip nat inside ip virtual-reassembly in duplex auto speed auto no mop enabled bridge-group 1 ! interface GigabitEthernet0/1 no ip address shutdown duplex auto speed auto ! interface ATM0/1/0 no ip address no ip redirects no ip unreachables no ip proxy-arp no atm ilmi-keepalive ! interface ATM0/1/0.1 point-to-point description Link to O2 Broadband ip address dhcp ip nat outside ip virtual-reassembly in atm route-bridged ip pvc 0/101 oam-pvc manage encapsulation aal5snap ! ! interface Ethernet0/1/0 no ip address shutdown ! interface BVI1 ! o2 box's cloned mac address in case it's the only allowed to connect to ISP's DSLAM mac-address 0024.1711.2233 ip address 10.0.0.1 255.0.0.0 ip nat inside ip virtual-reassembly in ! ip forward-protocol nd ! no ip http server no ip http secure-server ! ip dns server ip nat inside source list 10 interface ATM0/1/0.1 overload ! access-list 10 permit 10.0.0.0 0.255.255.255 ! ! snmp-server community contingency RO site snmp-server enable traps entity-sensor threshold ! control-plane ! bridge 1 protocol ieee bridge 1 route ip ! ! line con 0 logging synchronous line aux 0 line 2 no activation-character no exec transport preferred none transport input all transport output pad telnet rlogin lapb-ta mop udptn v120 ssh stopbits 1 line 0/0/0 0/0/1 no exec line vty 0 4 password cisco logging synchronous login transport input all ! scheduler allocate 20000 1000 ! end
Please notice that static ip route
has been excluded because ip address and default gateway are optained from ISP dhcp server. Here default gateway is: S 82.132.253.115 [254/0] via 93.96.104.1, ATM0/1/0.1
. This command is not needed for dynamic public IP address assignment via DHCP since that's the whole point of using DHCP. In other words, the default gateway should appear in routing table due to DHCP process with the ISP and not by manual configuration. The only time you need to manually configure the default gateway using DHCP is when you need to change the route administrative distance into something that fits your need. Should this be your choice, the command is the following:ip route 0.0.0.0 0.0.0.0 dhcp [ENTER NEW ADMINISTRATIVE DISTANCE HERE]
Reference: Configure router with integrated ADSL modem as DHCP client
r1-basic#sh ip route Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP + - replicated route, % - next hop override Gateway of last resort is 93.96.104.1 to network 0.0.0.0 S* 0.0.0.0/0 [254/0] via 93.96.104.1 10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks C 10.0.0.0/8 is directly connected, BVI1 L 10.0.0.1/32 is directly connected, BVI1 82.0.0.0/32 is subnetted, 1 subnets S 82.132.253.115 [254/0] via 93.96.104.1, ATM0/1/0.1 93.0.0.0/8 is variably subnetted, 2 subnets, 2 masks C 93.96.104.0/21 is directly connected, ATM0/1/0.1 L 93.96.106.142/32 is directly connected, ATM0/1/0.1
BT ADSL2+
General settings for broadband modems/routers:
- radius ppp username: broadband.user@btbroadband.com [provided by BT]
- radius ppp password: it is not required as BT uses the phone number you're connecting via for authentication but if your router still shouts for one, use: 'BT', 'password', 'password1'
- VPI number: 0
- VCI number: 38
- Authentication: CHAP
- Modulation: G.DMT
- Encapsulation: PPP over ATM (PPPoA); Virtual Circuit Multiplexing (VC-MUX)
- Multiplexing: VC-based or VC Mux
interface ATM0/0/0 no ip address no ip redirects no ip unreachables no ip proxy-arp ! The below command is deprecated. Use MFIB commands instead. no ip mroute-cache no atm ilmi-keepalive ! dsl operating-mode auto IOS12.4, in IOS15 this has been replaced to command .... in global config mode. But it is not necessary any more pvc 0/38 encapsulation aal5mux ppp dialer dialer pool-member 1
interface Dialer0 ip address negotiated '<-- or static IP -- ! ip nat outside use this command in IOS12.4 and then remove one line below ip nat enable ip virtual-reassembly encapsulation ppp dialer pool 1 dialer-group 1 ! fair-queue command is not available in IOS15 ppp authentication chap callin ppp chap hostname bthomehub@btbroadband.com ppp chap password 0 anything ppp pap sent-username bthomehub@btbroadband.com password 0 anything ppp ipcp dns request no cdp enable
- Experimental
PPP can insert a dynamic default route whenever IPCP negotiations succeed (and remove it when the line protocol goes down). To configure this feature (introduced in IOS releases 12.3(11)T and 12.4), use the ppp ipcp route default
interface configuration command on the primary dialer interface.
ip route 0.0.0.0 0.0.0.0 Dialer0 to interface Dialer0 ppp ipcp route default
ip forward-protocol nd ip route 0.0.0.0 0.0.0.0 Dialer0 ! ! 'ip nat inside source list 1 interface Dialer0' overload use this in IOS12.4 and remove the line below ip nat source list 1 interface Dialer0 overload ! access-list 1 permit 10.0.0.0 0.0.255.255 dialer-list 1 protocol ip permit
BT Infinity
It usually the same connection to DSLAM but it uses different encapsulation. Therefore a dialer interface configuration it's similar to ADSL config.
- VLAN: 101
- VLAN encapsulation: dot1q
- Authentication: CHAP (not confirmed)
- Modulation: (not confirmed)
- Encapsulation: PPP over Ethernet(PPPoE); Virtual Circuit Multiplexing (VC-MUX) (not confirmed)
- Multiplexing: VC-based or VC Mux (not confirmed)
interface Dialer0 description BT Infinity 40Mb down / 10 Mb upload mtu 1492 ip address ip.add.re.ss m.a.s.k ! no ip redirects #removed due to causing VPN reconnection no ip unreachables no ip proxy-arp ip nat enable ip virtual-reassembly in encapsulation ppp ip tcp adjust-mss 1452 dialer pool 1 dialer-group 1 ntp disable ppp authentication pap chap ms-chap callin ppp chap hostname D******@hg52.btclick.com ppp chap password 0 ****** ppp pap sent-username D******@hg52.btclick.com password 0 ****** ppp ipcp dns request no cdp enable interface ATM0/0/0 no ip address shutdown ! BT Infinity - PPPoE, interface atm0/0/0 need to be shutdown interface Ethernet0/0/0 no ip address ! interface Ethernet0/0/0.101 encapsulation dot1Q 101 pppoe enable group global pppoe-client dial-pool-number 1
- Regerence
Troubleshooting
no debug ppp authentication no debug ppp authorization no debug ppp negotiation no debug ppp subscriber no debug pppoe events no debug pppoe errors no debug ppp error no debug atm events
show atm interface atm 0/0/0 Interface ATM0/0/0: AAL enabled: AAL5,, Maximum VCs: 8, Current VCCs: 1 VCIs per VPI: 1024, Max. Datagram Size: 1658 PLIM Type: ADSL - 887Kbps Upstream, DMT, TX clocking: LINE 198286203 input, 1677750 output, 281727 IN fast, 149110058 OUT fast Avail bw = 887 Config. is ACTIVE
show atm pvc interface ATM 0/1/0 VCD / Peak Av/Min Burst Interface Name VPI VCI Type Encaps SC Kbps Kbps Cells St 0/1/0 2 0 101 PVC SNAP UBR 1261 UP
show atm pvc 0/101 Description: N/A ATM0/1/0.1: VCD: 1, VPI: 0, VCI: 101 UBR, PeakRate: 1248 (2944 cps) AAL5-LLC/SNAP, etype:0x0, Flags: 0x1840, VCmode: 0x0, Encapsize: 12 OAM frequency: 10 second(s), OAM retry frequency: 1 second(s) OAM up retry count: 3, OAM down retry count: 5 OAM END CC Activate retry count: 3, OAM END CC Deactivate retry count: 3 OAM END CC retry frequency: 30 second(s), OAM SEGMENT CC Activate retry count: 3, OAM SEGMENT CC Deactivate retry count: 3 OAM SEGMENT CC retry frequency: 30 second(s), OAM Loopback status: OAM Received OAM VC Status: Verified OAM Loop detection: Disabled ILMI VC status: Not Managed VC is managed by OAM. InARP DISABLED High Watermark: 0, Low Watermark: 0 InPkts: 18967, OutPkts: 16369, InBytes: 20644554, OutBytes: 3278440 InPRoc: 1090, OutPRoc: 1635, Broadcasts: 1966 InFast: 17877, OutFast: 12768, InAS: 0, OutAS: 0 InPktDrops: 0, OutPktDrops: 0/0/0 (holdq/outputq/total) CrcErrors: 0, SarTimeOuts: 0, OverSizedSDUs: 0, LengthViolation: 0, CPIErrors: 0 Out CLP=1 Pkts: 0 OAM cells received: 872 F5 InEndloop: 872, F5 InSegloop: 0, F5 InEndcc: 0, F5 InSegcc: 0, F5 InAIS: 0, F5 InRDI: 0 OAM cells sent: 872 F5 OutEndloop: 872, F5 OutSegloop: 0, F5 OutEndcc: 0, F5 OutSegcc: 0, F5 OutAIS: 0, F5 OutRDI: 0 OAM cell drops: 0 Status: UP
show controllers atm 0/1/0 Interface: ATM0/1/0, Hardware: MPC ATMSAR, State: up IDB: 0x30F78D2C Instance: 0x29F3DBDC PHY Inst: 0x00000000 us_bwidth: 1235 Slot: 0 Unit: 1 pkt Size: 4528 Sar ctrl queue: max depth = 0, current queue depth = 0, drops = 0, urun cnt = 0, total cnt = 0 VC TX ring stats: VCD VPI VCI Tx_ring_High_Watermark Tx_ring_Low_Watermark Queue_Depth ========================================================================== 1 0 101 128 124 0 VC QoS Summary -------------- Active Scheduled VCD VPI VCI COS ST COS PCR(c) PCR(a) SCR/MCR(c) SCR/MCR(a) -------------------------------------------------------------------------- 1 0 101 0 UBR 1235 1235 n/a n/a OAM statistics (vcd/count/drop) ------------------------------- 1/0/0 2/0/0 3/0/0 4/0/0 5/0/0 6/0/0 7/0/0 8/0/0 Misc Oam Drops: 0 ATM Encap Mapping Tx Congestion Entry MAC address VPI/VCI VCD sts set clr fastsend safestart drops ----------------------------------------------------------------------------------------------- 0 c022.5000.0001 0/101 1 0 0 0 353 1363 0
show controllers vDSL 0/1/0 Controller VDSL 0/1/0 is UP Daemon Status: Up XTU-R (DS) XTU-C (US) Chip Vendor ID: 'BDCM' 'BDCM' Chip Vendor Specific: 0x0000 0xA1E9 Chip Vendor Country: 0xB500 0xB500 Modem Vendor ID: 'CSCO' ' ' Modem Vendor Specific: 0x4602 0x0000 Modem Vendor Country: 0xB500 0x0000 Serial Number Near: FOC012345WM 1941/K9 15.2(4)M Serial Number Far: Modem Version Near: 15.2(4)M Modem Version Far: 0xa1e9 Modem Status: TC Sync (Showtime!) DSL Config Mode: AUTO Trained Mode: G.992.5 (ADSL2+) Annex A TC Mode: ATM Selftest Result: 0x00 DELT configuration: disabled DELT state: not running Trellis: ON ON SRA: disabled disabled SRA count: 0 0 Bit swap: enabled enabled Bit swap count: 1548 7 Line Attenuation: 44.0 dB 26.0 dB Signal Attenuation: 44.4 dB 25.6 dB Noise Margin: 6.5 dB 6.2 dB Attainable Rate: 10056 kbits/s 1235 kbits/s Actual Power: 19.1 dBm 12.1 dBm Total FECC: 22362 0 Total ES: 97 1 Total SES: 0 0 Total LOSS: 0 0 Total UAS: 449 449 Total LPRS: 0 0 Total LOFS: 0 0 Total LOLS: 0 0 Full inits: 1 Failed full inits: 1 Short inits: 1 Failed short inits: 0 Firmware Source File Name (version) -------- ------ ------------------- VDSL embedded VDSL_LINUX_DEV_01212008 (1) Modem FW Version: 120306_1254-4.02L.03.A2pv6C035j.d23j Modem PHY Version: A2pv6C035j.d23j Vendor Version: Ap6v35j.23j 68 DS Channel1 DS Channel0 US Channel1 US Channel0 Speed (kbps): 0 8644 0 1235 SRA Previous Speed: 0 0 0 0 Previous Speed: 0 0 0 0 Total Cells: 0 107787309 0 15380298 User Cells: 0 1874 0 3252 Reed-Solomon EC: 0 22362 0 0 CRC Errors: 0 127 0 1 Header Errors: 0 148 0 0 Interleave (ms): 0.00 7.94 0.00 0.24 Actual INP: 0.00 2.00 0.00 0.00 Training Log : Stopped Training Log Filename : flash:vdsllog.bin
Ping atm interface command
Use the ping atm interface
command to determine whether a particular PVC is in use. The PVC does not need to be configured on the router to use this command.
Verifies PVC integrity to the Verifies end-to-end immediate neighboring ATM device PVC integrity | | end-to-end OAM echoes segment OAM echoes end-to-end OAM echoes \ | / ping atm interface atm 0/0/0 0 38 {<cr> | seg-loopback | end-loopback} \ \ \ vci value <1-1023> Virtual Channel Identifier vpi value <0-31> Virtual Path Identifier PVC - permanent virtual circuit ATM - asynchronous transfer mode
Determining If a PVC Is in Use
r1#ping atm interface aTM 0/0/0 0 38 seg-loopback Type escape sequence to abort. Sending 5, 53-byte segment OAM echoes, timeout is 2 seconds: ..... Success rate is 0 percent (0/5)
This command sends five OAM F5 loopback packets to the DSLAM (segment OAM packets). If the PVC is configured at the DSLAM, the ping is successful.
r1#ping atm interface aTM 0/0/0 0 38 end-loopback Type escape sequence to abort. Sending 5, 53-byte end-to-end OAM echoes, timeout is 2 seconds: ..... Success rate is 0 percent (0/5)
Please note that ATM OAM Ping Feature returns unsuccessful ping on BT-ADSL line. I am not sure about others.
SNR and Line Attenuation
- SNR is Signal to Noise Ratio ** (aka Noise Margin or Signal to Noise Margin)
Relative strength of the DSL signal to Noise ratio. 6dB is the lowest dB manufactures specify for modem to be able to synch. In some instances interleaving can help raise the noise margin to an acceptable level. The higher the number the better for this measurement. The lower the SNR, the louder noise is on your line in comparison to the ADSL signal, so higher SNR is always better. Low SNR doesnt always mean low speed, more often than not it causes reliability issues, but depending on just how bad the noise is, it can eat away at subcarriers, which will lower your overall speed
- 6dB or below is bad and will experience no synch or intermittent synch problems
- 7dB-10dB is fair but does not leave much room for variances in conditions
- 11dB-20dB is good with no synch problems
- 20dB-28dB is excellent
- 29dB or above is outstanding
- Loop Att. is Line Attenuation
Measure of how much the signal has degraded between the DSLAM and the modem. Maximum signal loss recommendation is usually about 60dB. The lower the dB the better for this measurement.
- 20dB and below is outstanding
- 20dB-30dB is excellent
- 30dB-40dB is very good
- 40dB-50dB is good
- 50dB-60dB is poor and may experience connectivity issues
- 60dB or above is bad and will experience connectivity issues
- Output Power
How much power modem (upstream) or DSLAM (downstream) is using. Maximum recommended is about 15dB. The lower the power the better for this measurement.
DSL routers, in addition to the actual SNR, may define signal-to-noise margin (SNR margin) as the difference between the actual SNRand the SNRrequired to sync at a specific speed. For example:
- actual SNR = 44dB
- SNR to sync at 8Mbit/s = 35dB
- SNR margin = 44-35= 9dB
As with actual SNR, the higher that SNRmargin number, the better and above 6dB is acceptable.
SNR Adjustment for Stability
Go into global configuration mode and type the following:
service internal int atm 0 dsl noise-margin (a value between -3 and 3)
The service internal command exposes the dsl noise-margin command (and other hidden/non standard commands). The dsl noise-margin forces the router to training at a higher noise margin (sacrificing speed for stability). Setting this to 3 for example should see you get a higher noise margin, slower speed (and depending on firmware) a higher attenuation. Start at 3 and work your way down to 0 in 0.5 steps until you get a stable connection. A value of 0 is the same as not having this command at all (eg: normal settings). If you add a dsl noise-margin command, after a reload you’ll see “WARNING: Unsupported Command. May cause violation to ADSL standards.” on bootup, ignore it, it’s just the addition of the noise-margin command. Use the dsl noise-margin command to fine tune your connection to get that extra stability if required.
Cacti logging
Interleaving
When a customer is put on a "Noise Profile" usually their DSL line is changed from FastPath to Interleaved.
Interleaving is an error correction protocol that is implemented for your line at the DSLAM. With Interleaving enabled, the DSLAM can correct errors in the data stream it receives before passing that data to your gateway router. It is usually implemented on noisy or marginal lines and can greatly increase sync stability and effectively eliminate "first hop" packet loss. The largest drawback to Interleaving is that it will increase your ping time, specifically to your first hop gateway router.
If Interleaving is not enabled on your line, it is configured as FastPath. FastPath allows the DSLAM to pass the data received from you to the first hop router without performing any error correction. As a result, marginal lines could experience an increase in packet loss and decrease in sync stability (i.e. frequent sync loss). However, FastPath has lower ping times, especially to the first hop router.
show controllers vDSL 0/0/0
Controller VDSL 0/0/0 is UP
Daemon Status: Up
XTU-R (DS) XTU-C (US)
Chip Vendor ID: 'BDCM' 'IFTN'
Chip Vendor Specific: 0x0000 0x71C8
<-- output ommitted -->
Bit swap count: 3348 15
Line Attenuation: 55.5 dB 25.8 dB
Signal Attenuation: 61.5 dB 26.0 dB
Noise Margin: 3.1 dB 6.7 dB
Attainable Rate: 4840 kbits/s 896 kbits/s
Actual Power: 0.0 dBm 12.8 dBm
Total FECC: 552456 33948
<-- output ommitted -->
DS Channel1 DS Channel0 US Channel1 US Channel0
Speed (kbps): 0 4046 0 876
SRA Previous Speed: 0 0 0 0
Previous Speed: 0 4331 0 895
Total Cells: 0 546032971 0 117935394
User Cells: 0 135787856 0 35293248
Reed-Solomon EC: 0 57489 0 508
CRC Errors: 0 4950 0 2483
Header Errors: 0 725 0 72
Interleave (ms): 0.00 7.97 0.00 5.93
Actual INP: 0.00 1.16 0.00 0.41
<-- output ommitted -->
Friendly Advice/Time Saver: Even though you may (after a large amount of effort) be able to call the Helpdesk and get switched to Fastpath, there's usually a reason you are interleaved, so you may or may not be able to connect without it. Typically, the system will automatically switch back to interleaved after a short time anyway.
References
- Cisco Multimode VDSL2 and ADSL2/2+ High-Speed WAN Interface Card
- Cisco Multimode VDSL2 and ADSL2/2+ EHWIC Q&A
- Connecting DSL WAN Interface Cards
- Overview of Cisco Interface Cards for Cisco Access Routers It explains EHWIC, HWIC, WIC cards differences
- Configuring PPP over ATM with NAT
- Basic Router Configuration See Configuring VDSL Auto Mode & verify
- Cisco 880VA Series ISR G2 Multimode DSL Routers Our module EHWIC-VA-DSL-M card supports the same DSL and ATM features and modem firmware as available for the Cisco 880VA Series.
- DSL Troubleshooting
- Cisco DSL Router Configuration and Troubleshooting Guide - PPPoA Troubleshooting
- Cisco DSL Router Configuration and Troubleshooting Guide - PPPoE: DSL Router as a PPPoE Client Troubleshooting
- Cisco DSL Router Configuration and Troubleshooting Guide - Step-by-Step Configuration of PPPoA with a Static IP Address This applies to BT ADSL connection
- PPP Troubleshooting Flowchart
- Configuring and Troubleshooting PPP Password Authentication Protocol (PAP)
- Cisco DSL Router Configuration and Troubleshooting Guide - Step-by-Step Configuration of RFC1483 Pure Bridging Sep 26, 2006
- Cisco DSL Router Configuration and Troubleshooting Guide - RFC1483 Pure Bridging Troubleshooting Updated: Sep 26, 2006
- Chapter 11, Configuring IRB integrated routing and bridging
- ISP configs
- O2 broadband updated 2012
- Cisco 867VAE ROuter Configs update 2013, IOS 15
- How to set up O2 Home Broadband on your own router Original O2 source
- Cisco CPE and compatibility with BT ADSL Services good:)
- Other
- Output Interpreter Requires registration