There are three 1572 models:
- Cisco Aironet 1572IC—Internal Antennas with cable modem
- Cisco Aironet 1572EC—External Antennas with cable modem
- Cisco Aironet 1572EAC—External Antenna AC powered Model
The AP1572 highlights include:
- Most advanced carrier-grade outdoor Wi-Fi AP.
- Dual-band 2.4 and 5 GHz with 802.11ac Wave 1 support on the integrated 5 GHz radio.
- Maximum radiated RF power allowed by law.
- High Density Experience (HDX):
- Cisco CleanAir 2.0 technology provides integrated spectrum intelligence for a self configuring and self-healing network on 80 MHz channels.
- ClientLink 3.0 improves reliability and coverage for legacy 802.11n and 802.11ac data rates.
- Optimized Roaming to allow clients to join the most optimal access point.
- Turbo performance which uses Cisco ASIC design to maximize radio performance.
- Improved 802.11ac range and performance with 4x4:3 multiple-input multiple-output (MIMO) technology.
- 1.3 Gbps (5 GHz) 802.11ac data rates.
- Cisco Flexible Antenna Port technology.
- DOCSIS 3.0 / EuroDOCSIS / JapanDOCSIS 3.0, 24x8 hybrid fiber-coaxial (HFC) cable modem option.
- Improved radio sensitivity and range performance with four antenna MIMO and three spatial streams.
- Multiple uplink options (Gigabit Ethernet-10/100/1000 BaseT, Fiber SFP, Cable modem).
- Power: AC, DC, Cable, UPOE, PoE-Out (802.3at).
- 4G LTE coexistence.
- NEMA Type 4X certified enclosure.
- Module option: Investment protection and future proofing.
- Low visual profile design.
- Unified or autonomous operation.
More about the Aironet 1570 Deployment Guide you can read here:
Watch this video for an overview on Cisco Digital Network Architecture.
Raakhee Mistry (Marketing Manager, has been with Cisco for over 12 years, serving in product management, partner program and solutions marketing roles.) collected the different audiences’ responses to Cisco Digital Network Architecture. She pointed out: Analysts agree that Cisco DNA is a Game Changer. Yes. The New Cisco DNA is a Game Changer for the Digital Era.
Cisco DNA is short for Digital Network Architecture. The Cisco Digital Network Architecture is a platform that will give our customers both a roadmap to digitization and a path to recognize immediate benefits of network automation, assurance and security. Cisco released it at Cisco Partner Summit 2016.
Cisco DNA complements Cisco’s market leading, data center based Application Centric Infrastructure (ACI) technology by extending the policy driven approach and software strategy throughout the entire network: from campus to branch, wired to wireless, core to edge.
Cisco DNA is delivered within the Cisco ONE Software family, enabling simplified software-based licensing, and helping with investment protection and flexibility.
The IT networking industry continues to demand knowledgeable professionals to help manage, secure and optimize their network infrastructure. Networking jobs can be found worldwide in exciting industries such as fashion, sports, and entertainment. Research indicates that a certification is second only to a four year college degree as a way to qualify people for positions and certifications were rated to be the top criteria in being able to determine an applicant's qualifications.
Cisco Digital Network Architecture Benefits
- Insights. The network touches all things digital – users, devices, applications, sensors and cloud – and networking professionals are in a unique position to help their organizations capture insights in real time that allows businesses to make better decisions instantly and deliver better experiences.
- Automation. This area is centered on IT speed and simplicity. Today’s networking professionals are CLI jockeys, but that will offer less value as time goes on. The network is evolving to software with software-defined networking, open APIs, network function virtualization and more. These new technologies provide networking IT with unprecedented agility that helps IT deliver business requirements faster and can free up cycles to support more strategic projects for their organization.
- Security. While digital technologies have opened up new opportunities, they have also introduced a level of risk. As we see the proliferation of mobile devices and cloud adoption, the network perimeter is evolving and the attack surface has the potential to grow significantly. To combat that risk, networking professionals will be able to offer the business a new approach to inject security pervasively through the network, which can be the sensor and enforcer of security threats.
Do you know the Cisco IP Phone Registration, Boot UP Sequence and related issues? Someone shared the main issues of IP Phone, SCCP & SIP Phone Registration Process with CUCM before. In this article we will talk something about the IP PHONE REGISTRATION ISSUES.
Firstly, let’s understand what Cisco IP Phone Registration & Boot UP Sequence are.
Step 1: Phone Loads Software (Image) and Starts the Configuration Process
Step 2: a. Phone Sends DHCP Request
b. DHCP Server Sends DHCP Response
Step 3: a. Phone Sends TFTP Request for a Configuration File
b. TFTP Server Sends the Default Configuration File
Step 4: a. TFTP Server Sends the Specific Configuration File of the Phone
b. Phone Registration Finishes
FIRST UNDERSTAND THE BOOTUP PROCESS, START TROUBLESHOOTING ACCORDING:
General Troubleshooting Sequence:
- Disable DHCP and DNS to Test a Phone
- Check for the Incorrect MAC Address on the Phone Label
- Cisco CallManager and TFTP Services Do Not Run
- Delete and Recreate a Phone
- Understand a Network Trace File
- Use Performance Monitor to Analyze Phone Activity
- Manually Configure the IP Parameters on a 12 SP+ or 30 VIP Phone
- Add Phones to Cisco CallManager
- Enable, Configure, and Disable Auto−Registration
- Manual Registration (Add an IP Phone Manually) etc....
THESE ISSUES COULD BE THERE:
- IP Phone Registration Toggles between Primary and Secondary CallManagers.
- Registration Rejected
- Cisco IP Phones Not Registered But seems to be working fine.
- Cisco IP Phones Take Too Long to Register.
- Cisco IP Phone Always Get Registered to the Publisher Server.
- Get "version error" on the Cisco IP Phone screen When Try to Register.
- Cisco phones causing excessive DHCP requests.
See the Figure"CISCO IP Phone Boot UP Process" above
Step 1: Phone Loads Software (Image) and Starts the Configuration Process:
During this step, these issues could be there,
* Registration with a Cisco CallManager server is successful only when the server adds the phone or when the server has Auto−Registration enabled. (The default for Auto−Registration is disabled.)
* Note: If the phone LCD screen does not light up, you could have a faulty phone. The phone also could be faulty if the message the phone displays never changes after you plug in the phone. Contact Cisco Technical Support to request a replacement if your phone is under warranty.
* If your phones do not use DHCP, see the Step 3a: Phone Sends TFTP Request for a Configuration File section of this document.
a). Phone Sends DHCP Request:
During this step, these issues could be there,
For Cisco 7940 and 7960: (to manually enable the DHCP Parameter on the phone itself):
Complete these steps on the Cisco 7940 and 7960:
1. Choose Settings.
2. Choose 3 (Network).
Scroll down to the DHCP Enabled parameter.
The selection must be Yes.
Complete these steps on the Cisco 7910:
1. Choose Settings.
2. Choose 6 (Network).
3. Scroll down to the DHCP Enabled parameter.
The selection must be Yes.
Cisco 12 SP+ and 30 VIP
Complete these steps on the Cisco 12 SP+ and 30 VIP:
1. Enter **#.
2. Enter 1.
3. Set all parameters to zero (0).
Note: Cisco 7910G supports only 10 MB speed, but 7910G+SW supports 10/100. If you have a 7910G, be sure to set the switch port that connects to the phone to 10 MB or Auto.
Any IP parameters that you have hard coded on the phones override the parameters that the DHCP server provides. In particular, the Alternate TFTP Server option overrides the TFTP server IP address that the DHCP provides. For information on how to reset your phone configuration to the original factory defaults, refer to either of these documents:
¨ Resetting 7900 Series IP Phones to Factory Defaults
b). DHCP Server Sends DHCP Response:
The DHCP response contains the phone IP address and the IP address of the TFTP server (which is usually a Cisco CallManager server). The response can also contain any of or all these common options:
· IP address of the default router (gateway)
· IP address of the Domain Name System (DNS) server
· Domain name includes option 150 for the TFTP server.
a). Phone Sends TFTP Request for a Configuration File:
- The phone requests a specific configuration file. The name for this file is SEPMAC−Address.cnf. For example, the file name for a phone with the MAC address 0030.94C2.D5CA is SEP003094C2D5CA.cnf. If the file exists on the Cisco CallManager server, see the Step 4a: TFTP Server Sends the Specific Configuration File of the Phone section of this document.
- If the phone is not in the Cisco CallManager database, the request for the specific configuration file results in a TFTP File Not Found response from the TFTP server. The phone then requests the file with the name SEPDEFAULT.cnf. If you have configured the Cisco CallManager server for Auto−Registration, this file exists and the server sends it to the phone. See the Step 3b: TFTP Server Sends the Default Configuration File section of this document.
Otherwise, the TFTP server of the Cisco CallManager server sends another File Not Found TFTP response. At this point, the phone restarts the configuration process.
b). TFTP Server Sends the Default Configuration File:
Note: This step only occurs if you have enabled Auto−Registration and the phone has not already registered
with the Cisco CallManager server.
If you have configured the Cisco CallManager server for Auto−Registration, it sends the SEPDEFAULT.cnf
file in response to the phone request. After the Cisco CallManager server database adds a phone by Auto−Registration, the phone has a SEPMAC−Address.cnf file. It does not reference the SEPDEFAULT.cnf
a). TFTP Server Sends the Specific Configuration File of the Phone:
Note: This step only takes place if the phone creation occurred on the Cisco CallManager server. The configuration file contains several parameters for the phone. These include the device pool, the Cisco CallManager servers to use, configured speed dials, and other parameters. In general, any time you make a change in Cisco CallManager that requires the phone (device) to be reset, you have made a change to the phone configuration file.
b). Phone Registration Finishes:
The Cisco CallManager server sends the phone additional configuration elements during the final phases of the registration process.
In general, the registration process must complete successfully if the process goes this far.
To learn what takes place at this point, you need to set up a network analyzer to capture the IP packets that the phone sends to and receives from the server.
7961G Phone does not Register until it is Configured as a 7961>
IP phones CP−7961 and CP−7961G are basically the same platform. The G stands for global use that supports all languages.
So when you add a 7961G phone, you should add it as a regular 7961 phone. CP−7961G−GE is another IP phone with two gigabit Ethernet ports (10/100/1000).
If IP phone 7961G is added as 7961G−GE, it does not register with Cisco CallManager.
TASKS TO PERFORM:
Disable DHCP and DNS to Test a Phone
Check for the Incorrect MAC Address on the Phone Label
Cisco CallManager and TFTP Services Do Not Run
Delete and Recreate a Phone
Understand a Network Trace File
Use Network Monitor to Analyze Phone Activity
By default, Cisco phones are DHCP−enabled. If you do not use DHCP, you need to disable DHCP on the phone and manually assign the phone an IP address. In order to disable DHCP on a phone, use the phone keypad to program the phone IP address and other network addresses.
Enable, Configure, and Disable Auto−Registration
Manual Registration (Add an IP Phone Manually)
Note: If you have your Cisco CallManager servers set up in a cluster, every server has the configuration files for every phone that is in the Publisher database. Therefore, any Cisco CallManager server can serve as a TFTP server for the phones. The device pools to which you have assigned the phones determine the server with which the phones register. A phone can obtain the configuration file from a different server than the server with which the phone registers.
Original reference and more discussions from