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P-870HN-51b Support Notes

CLI Command List

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Содержание P-870HN-51B

Страница 1: ...P 870HN 51b 802 11n VDSL2 4 port Gateway Support Notes Firmware Version 1 00 BKK 0 b2 September 2009 Edition 1 0...

Страница 2: ...ulticast Introduction 23 IGMP Multicast Proxy Configuration 24 Protocol Based Scenario 25 Environment 25 WAN Configuration 25 VLAN Based Scenario 33 Environment 33 WAN Configuration 34 Quality of Serv...

Страница 3: ...I am using PPPoE 103 Why does my provider use PPPoE 103 Which Internet Applications can I use with the device 103 How can I configure the device 103 What network interface does the device support 103...

Страница 4: ...12 What is 802 11g 112 Is it possible to use products from a variety of vendors 113 What is Wi Fi 113 What types of devices use the 2 4GHz Band 113 Does the 802 11 interfere with Bluetooth devices 113...

Страница 5: ...SSID 117 What are Insertion Attacks 117 What is Wireless Sniffer 118 What is the difference between Open System and Shared Key of Authentication Type 118 What is 802 1x 118 What is the difference bet...

Страница 6: ...lay Service keeps the high quality delivery in VDSL high speed Internet access PPP over Ethernet Since the PPPoE will benefit both Telco and ISP the P 870HN 51b shall implement this feature and be tes...

Страница 7: ...d with P 870HN 51b in a FTTC Fiber to the Curb solution The P 870HN 51b serves as a home gateway providing the high speed INTERNET service and High Quality IPTV service The COE VDSL switch is located...

Страница 8: ...TTB Fiber to the Building solution The P 870HN 51b serves as a home gateway providing the high speed INTERNET service High Quality IPTV service and VoIP service The COE VDSL switch is located inside t...

Страница 9: ...TCP IP go to the next section to configure it otherwise follow these steps to install In the Control Panel Network window click Add button In the Select Network Component Type windows select Protocol...

Страница 10: ...S Configuration tab and select Disable DNS Click OK to save and close the TCP IP properties window Click OK to close the Network window You will be prompted to insert your Windows CD or disk When the...

Страница 11: ...the embedded Web server that allows you to use Web browser to configure it Before configuring the router using Browser please be sure there is no Telnet or Console login a Login the P 870HN 51b via W...

Страница 12: ...e commonly used CI commands is provided at the end of this document b Login the P 870HN 51b via Telnet 1 Set up your PC NB IP address to be a DHCP client 2 Connect to a LAN port of P 870HN51b via RJ45...

Страница 13: ...t Connection Bridge Mode Scenario The P 870HN 51b is a CPE bridge a Bridge Mode 1 Go to Network WAN Internet Connection 2 Click Add 3 Select the Layer 2 interface for this service e g ptm0 0_0_1 4 Cli...

Страница 14: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 7 Click Next 8 Click Apply Save...

Страница 15: ...de Scenario The P 870HN 51b is a DHCP client in routing mode b IPoE Mode 1 Go to Network WAN Internet Connection 2 Click Add 3 Select the Layer 2 interface for this service e g ptm0 0_0_1 4 Click Next...

Страница 16: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 7 Click Next 8 Select Obtain an IP address automatically 9 Click Next 10 Select Enable NAT...

Страница 17: ...nts copyright c 2009 ZyXEL Communications Corporation 11 Click Next 12 Select the WAN Interface e g ptm0 for the default gateway 13 Click Next 14 Select Select DNS Server Interface from Available WAN...

Страница 18: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 15 Click Next 16 Click Apply Save...

Страница 19: ...E Mode Scenario The P 870HN 51b is a PPPoE client c PPPoE Mode 1 Go to Network WAN Internet Connection 2 Click Add 3 Select the Layer 2 interface for this service e g ptm0 0_0_1 4 Click Next 5 Select...

Страница 20: ...tions Corporation 7 Click Next 8 Enter the PPP Username e g test isp net 9 Enter the PPP Password e g 1234 10 Enter the PPPoE Service Name e g PPPoE 11 Select the Authentication Method to be AUTO 12 C...

Страница 21: ...0HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 14 Click Next 15 Select Select DNS Server Interface from Available WAN Interface and select the interface 16 Click...

Страница 22: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 17 Click Apply Save...

Страница 23: ...gned to the permanent IP hosts group and 224 0 0 2 is assigned to the multicast routers group The IGMP Internet Group Management Protocol is the protocol used to support multicast groups The latest ve...

Страница 24: ...ation IGMP Multicast Proxy Configuration a IGMP Multicast Proxy 1 Go to Network WAN Internet Connection 2 Select the WAN interface IPoE or PPPoE and click on Edit 3 Go the page where IGMP Multicast Pr...

Страница 25: ...n methods for separating different types of traffic is by classifying their transmitting protocols In the case of the aforementioned diagram the INTERNET traffic is encapsulated in the PPPoE and the I...

Страница 26: ...cations Corporation a Internet Service 1 Go to Network WAN Internet Connection 2 Click Add 3 Select the Layer 2 interface for this service e g ptm0 0_0_1 4 Click Next 5 Select the WAN service type i e...

Страница 27: ...PPP Username e g test isp net 9 Enter the PPP Password e g 1234 10 Enter the PPPoE Service Name e g PPPoE 11 Select the Authentication Method to be AUTO 12 Click Next 13 Select the WAN Interface e g p...

Страница 28: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 16 Click Next 17 Click Apply Save...

Страница 29: ...ications Corporation b IPTV Service 1 Go to Network WAN Internet Connection 2 Click Add 3 Select the Layer 2 interface for this service e g ptm0 0_0_1 4 Click Next 5 Select the WAN service type i e IP...

Страница 30: ...contents copyright c 2009 ZyXEL Communications Corporation 8 Select Obtain an IP address automatically 9 Click Next 10 Select Enable IGMP Multicast Proxy 11 Click Next 12 Select the WAN Interface e g...

Страница 31: ...0HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 13 Click Next 14 Select Select DNS Server Interface from Available WAN Interface and select the interface 15 Click...

Страница 32: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 16 Click Apply Save...

Страница 33: ...commonly known methods for separating different types of traffic is by classifying their VLAN ID In the case of the aforementioned diagram the INTERNET traffic is tagged with a VID 100 and the IPTV tr...

Страница 34: ...ight c 2009 ZyXEL Communications Corporation WAN Configuration a INTERNET Service 1 Go to Network WAN Layer 2 Interface 2 Remove the default ptm0 Interface 3 Click Add 4 Select VLAN MUX mode 5 Select...

Страница 35: ...onnection 8 Click Add 9 Select the Layer 2 interface for this service e g ptm0 0_0_1 10 Click Next 11 Select the WAN service type i e IP over Ethernet 12 Enter the Service Description e g Internet 13...

Страница 36: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 16 Click Next 17 Select Obtain an IP address automatically 18 Click Next 19 Select Enable NAT...

Страница 37: ...s copyright c 2009 ZyXEL Communications Corporation 20 Click Next 21 Select the WAN Interface e g ptm0 100 for the default gateway 22 Click Next 23 Select Select DNS Server Interface from available WA...

Страница 38: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 24 Click Next 25 Click Apply Save...

Страница 39: ...N Internet Connection 2 Click Add 3 Select the Layer 2 interface for this service e g ptm0 0_0_1 4 Click Next 5 Select the WAN service type i e IP over Ethernet 6 Enter the Service Description e g IPT...

Страница 40: ...copyright c 2009 ZyXEL Communications Corporation 10 Click Next 11 Select Obtain an IP address automatically 12 Click Next 13 Select Enable IGMP Multicast Proxy 14 Click Next 15 Select the WAN Interfa...

Страница 41: ...0HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 16 Click Next 17 Select Select DNS Server Interface from available WAN Interface and select the interface 18 Click...

Страница 42: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 19 Click Apply Save...

Страница 43: ...870HN 51b has the ability to assign different task in accordance with the chosen type of traffic In the case of the aforementioned diagram we would like to limit the maximum upload rate of the IPTV se...

Страница 44: ...ications Corporation QoS configuration a Enable QoS 1 Make sure that QoS is enabled in Network WAN Layer2 Interface 2 Go to Advanced QoS General 3 Check the Active QoS box 4 Go to Advanced QoS Queue S...

Страница 45: ...870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation 8 Select the Interface 9 Select the Priority 10 Select the Weight 11 Input the Rate Limit e g 350 12 Click Apply...

Страница 46: ...ideo traffic 1 Go to Advanced QoS Class Setup 2 Select the Active box 3 Select the Classification Order 4 Select the Forward To Interface 5 Select the To Queue as Queue1 6 Select the From Interface e...

Страница 47: ...orting costs It can also help the VDSL ISP Internet Service Provider to reduce operation effort as well as enhance customer satisfaction In the case of the aforementioned diagram the TR069 ACS server...

Страница 48: ...rs for the ACS server 1 Go to Advanced Remote MGNT TR069 Auto Configure 2 Check the Inform box to Enable 3 Enter the Inform Interval e g 30 seconds 4 Enter the ACS URL e g http 59 124 163 140 TR069 5...

Страница 49: ...not define any servers the NAT offers the additional benefit of firewall protection In such case all incoming connections to your network will be filtered out by the CPE thus preventing intruders from...

Страница 50: ...s to one IGA 3 Many to Many Overload In Many to Many Overload mode the CPE maps the multiple ILAs to shared IGA 4 Many to Many No Overload In Many to Many No Overload mode the CPE maps each ILA to uni...

Страница 51: ...GA1 Both Many to One ILA1 IGA1 ILA2 IGA1 Outgoing Many to Many Overload ILA1 IGA1 ILA2 IGA2 ILA3 IGA1 ILA4 IGA2 Outgoing Many to Many No Overload Allocate by Connections ILA1 IGA1 ILA2 IGA3 ILA3 IGA2...

Страница 52: ...complete the NAT mapping and most popular Internet multimedia applications This feature is the best described with the NAT port forwarding feature implemented in the CPE In the case of the above diagr...

Страница 53: ...e e g IPTV ptm0_1 4 Enter the Server IP Address e g 192 168 1 33 5 Enter the External port Start e g 21 6 Enter the External port End e g 21 7 Enter the Internal port Start e g 999 8 Enter the Interna...

Страница 54: ...es All contents copyright c 2009 ZyXEL Communications Corporation port number of the CPE s FTP server port will automatically be moved to 2121 A new port forwarding rule is now created Show the IP con...

Страница 55: ...yright c 2009 ZyXEL Communications Corporation Use the notebook to access the FTP server with IP 172 23 30 106 Show the history log of FTP server We can see that the client notebook with IP 172 23 98...

Страница 56: ...ing solves this problem by allowing computers on the LAN to dynamically take turns using the service The trigger port is a port or a range of ports that causes or triggers the device to record the IP...

Страница 57: ...open up all the internal ports to the dedicated Server IP in this case IP 192 168 1 33 allowing client at the WAN side to access the FTP server via port forwarding a Create a DMZ host 9 Go to Network...

Страница 58: ...b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation Show the history log of FTP server We can see that the client notebook with IP 172 23 98 235 is in fact logged into the F...

Страница 59: ...09 ZyXEL Communications Corporation SIP ALG Configuration A SIP ALG allows SIP calls to pass through NAT by examining and translating IP addresses embedded in the data stream a Enable SIP ALG 1 Go to...

Страница 60: ...Denial of service DoS function it provides the first line of defense against hackers network intruders and other hazardous threats In the case of the above scenario we would like to have the CPE filt...

Страница 61: ...contents copyright c 2009 ZyXEL Communications Corporation IP Filter Configuration a Make sure that Firewall is enable in the WAN Show the IP configuration of notebook Use the notebook to ping the P 8...

Страница 62: ...b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation We can see that the ICMP packets do not come back it is clearly that the ping request packets have all been filtered out...

Страница 63: ...Notes All contents copyright c 2009 ZyXEL Communications Corporation Configuration of Accepting Incoming Traffic b Configure the IP Filtering Setup 1 Go to Security Firewall 2 Check the Active Firewa...

Страница 64: ...g ping 6 Select the Protocol e g ICMP 7 Enter the Source IP address e g 172 23 98 235 8 Enter the Source Subnet Mask e g 255 255 248 0 9 Click Apply Use the notebook to ping the P 870HN 51b with IP 1...

Страница 65: ...local networks to the ISP or a remote node we call this function as IP Alias In this case an internal router is not required For example the network manager can divide the local network into three ne...

Страница 66: ...ts copyright c 2009 ZyXEL Communications Corporation IP Alias Configuration a IP Alias 1 Go to Network LAN IP 2 Check the Active IP Alias box 3 Enter the IP Address e g 10 0 0 1 4 Enter the IP Subnet...

Страница 67: ...enance The P 870HN 51b has the ability to record the events happening in the CPE into a system log according to the severity and maintain this log in itself a Activate the Maintenance Log 1 Go to Main...

Страница 68: ...tents copyright c 2009 ZyXEL Communications Corporation b Show the log in the Web GUI 1 Go to Maintenance Logs ViewLog 2 Select the Display e g Low c Show the log by Telnet 1 Login the device by Telne...

Страница 69: ...outside the CPE Let s say that we want the system log to be sent to the notebook with IP 192 168 1 101 a Activate the Maintenance Log 1 Go to Maintenance Logs Log Settings 2 Check the Active box 3 Se...

Страница 70: ...contents copyright c 2009 ZyXEL Communications Corporation Maintenance Tool Maintenance Procedure a Upload Firmware 1 Go to Maintenance Tools Firmware 2 Click Browse 3 Select the Firmware to upload a...

Страница 71: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation b Save Configuration 1 Go to Maintenance Tools Configuration 2 Click Backup 3 Click Save...

Страница 72: ...nts copyright c 2009 ZyXEL Communications Corporation 4 Select the directory to save and click Save c Upload Configuration 1 Go to Maintenance Tools Configuration 2 Click Browse 3 Select the configura...

Страница 73: ...ess transmissions are easier to intercept than transmissions over wired networks and wireless is a shared medium Everything that is transmitted or received over a wireless network can be intercepted T...

Страница 74: ...nses against this attack To avoid encrypting two cipher texts with the same key stream an Initialization Vector IV is used to augment the shared WEP key secret key and produce a different RC4 key for...

Страница 75: ...8 bit WEP key secret key with 13 characters o 128 bit WEP key secret key with 26 hexadecimal digits IEEE 802 1x Introduction The IEEE 802 1x port based authentication is desired to prevent the unautho...

Страница 76: ...e Wireless AP The 802 1x contains tree major components 1 Authenticator The device i e Wireless AP facilitates the authentication for supplicant Wireless client attached on the Wireless network Authen...

Страница 77: ...s AP have built in authentication server therefore the external RADIUS authentication server is not needed In this case the Wireless AP is acted as both authenticator and authentication server Authent...

Страница 78: ...lient can always access the network 2 Force Unauthorized Causes the port to remain in the unauthorized state ignoring all attempts by the client to authenticate The authenticator cannot provide authen...

Страница 79: ...with one another by using the Extensible Authentication Protocol EAP and RFC 2284 The EAP was originally designed to run over PPP and to authenticate the dial in users but the 802 1x defines an encaps...

Страница 80: ...ponds with an EAP response identity frame However if during boot up the supplicant does not receive an EAP request identity frame from the Wireless AP the client can initiate the authentication by sen...

Страница 81: ...L Communications Corporation The EAPOL packet contains the following fields protocol version packet type packet body length and packet body Most of the fields are obvious The packet type can have four...

Страница 82: ...TLS information required for authentication EAPOL Start This supplicant sends this packet when it wants to initiate the authentication process EAPOL Logoff The supplicant sends this packet when it wa...

Страница 83: ...atabase uses the MD5 EAP which can not generate keys The WPA improves data encryption by using Temporal Key Integrity Protocol TKIP Message Integrity Check and IEEE 802 1x Temporal Key Integrity Proto...

Страница 84: ...k 802 11bg wireless NIC required under the WPA PSK as its security mode a Wireless Setup 1 Go to Network Wireless LAN General 2 Check the Active Wireless LAN box 3 Enter the Network Name SSID e g TEST...

Страница 85: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation Show all the wireless networks in your notebook 802 11bg wireless NIC required Enter the WPA PSK pre shared key...

Страница 86: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation We can see that the notebook is now connected to the WLAN interface of the P 870HN 51b...

Страница 87: ...to Network Wireless LAN General 2 Check the Active Wireless LAN box 3 Enter the Network Name SSID e g TEST_01 4 Check the Hide Network Name SSID box 5 Select the Security Mode e g WPA PSK 6 Select the...

Страница 88: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation Show all the wireless networks in your notebook As we can see we cannot find the SSID TEST_01...

Страница 89: ...70HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation To connect to TEST_01 we need to configure the Wireless Network Connection Properties of the notebook WLAN interfa...

Страница 90: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation Go Connection tab and check the box under the name of Connect when this network is in range...

Страница 91: ...870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation Then we will see the notebook connected to the TEST_01 even though the SSID is now displayed in the broadcast lis...

Страница 92: ...n c Wireless Setup Using Auto Generate Key 1 Go to Network Wireless LAN General 2 Check the Active Wireless LAN box 3 Check the Auto Generate Key box 4 Select the Security Mode e g WPA PSK 5 Select th...

Страница 93: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation Show all the wireless networks in your notebook Enter the WPA PSK pre shared key auto generated by P 870HN 51b...

Страница 94: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation We can see that the notebook is now connected to the WLAN interface of the P 870HN 51b...

Страница 95: ...lling the name Wi Fi Protected Setup There are several different methods defined in WPS to simplify the process of configuration P 870HN 51b supports two of those methods which are the PIN Method and...

Страница 96: ...c 2009 ZyXEL Communications Corporation More AP configuration This feature allows you to enable and configure multiple BSSs a More AP setup 1 Go to Network Wireless LAN More AP 2 Click Modify b Common...

Страница 97: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation...

Страница 98: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation WPS configuration a WPS Setup 3 Go to Network Wireless LAN WPS 4 Check the Enable WPS box 5 Click Apply...

Страница 99: ...s copyright c 2009 ZyXEL Communications Corporation b WPS Station Setup 1 Go to Network Wireless LAN WPS Station 2 Click the Push Button Note You must press the other wireless device s WPS button with...

Страница 100: ...nications Corporation WDS configuration Use this feature to set up your WDS links between the ZyXEL device and other wireless APs a WPS Setup 1 Choose the operation mode to Access Point Bridge or Wire...

Страница 101: ...Wireless Advance Setup 1 Set the RTP CTS Threshold e g 2347 2 Set the Fragmentation Threshold e g 2346 3 Set the Number of Wireless Station Allowed e g 16 4 Set the Output Power e g 100 5 Set the Mul...

Страница 102: ...ts LAN ports and one VDSL WAN port You should connect the computer to the LAN port and connect the VDSL line to the WAN port If the ISP uses PPPoE you need the user account to access Internet What is...

Страница 103: ...band connections Besides PPPoE supports a broad range of existing applications and service including authentication accounting secure access and configuration management Which Internet Applications ca...

Страница 104: ...e and Debbie will be able to send e mail through the device using jane mycompany com and debbie mycompany com respectively as their e mail addresses They will be able to retrieve their individual priv...

Страница 105: ...le reset hole beside the power connector Press down the reset button and hold down for approx 5 second the unit will be reset When the reset button is pressed the devices all parameter will be reset b...

Страница 106: ...irst place What is Multi NAT NAT Network Address Translation NAT RFC 1631 is the translation of an Internet Protocol address used within one network to a different IP address known within another netw...

Страница 107: ...ress What IP Port mapping does Multi NAT support NAT supports five types of IP port mapping They are One to One Many to One Many to Many Overload Many to Many No Overload and Server The details of the...

Страница 108: ...the difference between SUA and Multi NAT SUA Single User Account in previous ZyNOS versions is a NAT set with 2 rules Many to One and Server The device now has Full Feature NAT support to map global...

Страница 109: ...s WWW DYNDNS ORG Without DDNS we always tell the users to use the WAN IP of the 312 to reach our internal server It is inconvenient for the users if this IP is dynamic With DDNS supported by the devic...

Страница 110: ...rmation anywhere in their organization This mobility supports productivity and service opportunities not possible with wired networks b Installation Speed and Simplicity Installing a wireless LAN syst...

Страница 111: ...this will create additional security risk for the remote user if not properly protected What is an Access Point The AP access point also known as a base station is the wireless server that with an an...

Страница 112: ...and can increase the cost of the overall solution because a greater number of access points may be required 802 11a is not directly compatible with 802 11b or 802 11g networks In other words a user eq...

Страница 113: ...applications use the 2 4 GHz band This includes WLAN systems not necessarily of the type IEEE 802 11b cordless phones wireless medical telemetry equipment and Bluetooth short range wireless applicatio...

Страница 114: ...s Solution 1 Minimizing the number of walls and ceilings 2 Antenna is positioned for best reception 3 Keep WLAN products away from electrical devices eg microwaves monitors electric motors etc 4 Add a...

Страница 115: ...station into a higher data rate bit sequence using a chipping code The chipping code also known as processing gain introduces redundancy which allows data recovery if certain bit errors occur during t...

Страница 116: ...ngle shared password between base stations and clients What is an ESSID ESSID stands for Extended Service Set Identifier and identifies the wireless LAN The ESSID of the mobile device must match the E...

Страница 117: ...e the same encryption level in order to make a connection Can the SSID be encrypted WEP the encryption standard for 802 11 only encrypts the data packets not the 802 11 management packets and the SSID...

Страница 118: ...tem authentication Share Key The optional authentication that involves a more rigorous exchange of frames ensuring that the requesting station is authentic For a station to use shared key authenticati...

Страница 119: ...rs to the idea of managing subscribers by controlling their access to the network verifying that they are who they say they are via login name and password or MAC address and accounting for their netw...

Страница 120: ...le Shooting In case of problems happening to the P 870HN 51b we are able to check the device with more detailed information by entering the shell mode Those statistics may help the engineer to pinpoin...

Страница 121: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation CPU usage Command top press Ctrl C to exit Memory usage Command cat proc meminfo...

Страница 122: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation Current processes Command ps IGMP table Command cat proc net igmp...

Страница 123: ...P 870HN 51b Support Notes All contents copyright c 2009 ZyXEL Communications Corporation Packets statistics Command cat proc net dev Physical layer statistics Command adslctl info stats...

Страница 124: ...n CLI Command List The latest CI command list is available in release notes of every ZyXEL firmware release Please go to ZyXEL public WEB site http www zyxel com web support_download php to download f...

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