CCNP Wireless CUWSS 642-732 Summary Notes 15 : Attenuation and Data Rates

RF Reflectors and Absorbers in the building Signal Attenuation Each 3-dB attenuation reduces the signal strength by half Moving objects may also affect the signal Break rooms and test labs may produce 2.4-GHz iinterference and create multipath distortion and RF shadows. Elevator shafts block and reflect RF signals. Supply rooms with inventory absorb RF signals. Interior offices … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 15 : Attenuation and Data Rates

CCNP Wireless CUWSS 642-732 Summary Notes 14 : Layer 1 Active Site Survey – Cisco Spectrum Expert

Cisco Spectrum Expert: Active Site Surveys (Layer 1 Sweep) Recommended tool of choice - Cisco Spectrum Expert With Cisco Spectrum Expert, you can detect, classify, locate, and mitigate sources of wireless interference to optimize network performance for mobility applications. Cisco Spectrum Expert is a combination of both hardware and software. Cisco Spectrum Expert is delivered as hardware in … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 14 : Layer 1 Active Site Survey – Cisco Spectrum Expert

CCNP Wireless CUWSS 642-732 Summary Notes 13 : Defining Site Survey Documentation

Define the Deliverables A site survey preassessment form to help determine the length and type of survey, what equipment will be needed, and what questions the engineer will need to ask during the walk through the facility. Pre-Assesment Form that summarizes customer requirements Customer contact information WLAN Objectives Building to be covered Physical Information and Building Size Number … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 13 : Defining Site Survey Documentation

CCNP Wireless CUWSS 642-732 Summary Notes 12 : Planning for Site Survey

Kickoff Meeting Arrange to meet up with the all the people that will be involved in the project from the sponsors to the IT to the security team. This is when you review and finalize the Statement of Work SoW Reconsile contradicting answers. Verify scope of the mission. Explain the expectations Let them know what … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 12 : Planning for Site Survey

CCNP Wireless CUWSS 642-732 Summary Notes 11 : Predictive Site Survey

Site survey could be done in 3 steps: Virtual site survey using a planning tool for a general overview ThisisusuallydoneusingtheWLC. First add the map of the area to be surveyed. Layer 1 sweep to discover existing RF Actual survey to establish the placing of the APs. Predictive Site Survey They do not take into account … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 11 : Predictive Site Survey

CCNP Wireless CUWSS 642-732 Summary Notes 10 : Designing a mesh network

Design Considerations (especially outdoors) Consider the data rate required at the edge of the cell Larger cells offer binary phase shift keying (BPSK) or quadrature phase shift keying (QPSK) data rates at the edge but require fewer hops to wired network. Smaller cells may offer quadrature amplitude modulation (QAM) (16QAM or even 64 QAM) at the edge hence … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 10 : Designing a mesh network

CCNP Wireless CUWSS 642-732 Summary Notes 9 : Mesh Networks

Indoor Mesh Networks This is an excellent way of providing coverage in hard to wire environments or where cables cannot be used or if cable length is too long (> 100 m). Indoor mesh access points: Cisco Aironet 1130 Series - controller based Cisco Aironet 1240 Series - controller based The APs deliver network access to … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 9 : Mesh Networks

CCNP Wireless CUWSS 642-732 Summary Notes 8 : Bridging Models

Point to Point Wireless Links Cisco Aironet 1500 Series Access Point can use its backhaul radio to bridge two wired segments in point to point mode. Its a mesh network with only one MAP and no WLAN clients. If Ethernet bridging is enabled, then wireless client access can be provided but is not recommended if … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 8 : Bridging Models

CCNP Wireless CUWSS 642-732 Summary Notes 7 : Survey Models

Data Only Coverage Does not require a large amount of overlap due to rate shifting; generally 5 to 10 percent, with 10 - 15  % overlap between the cells Separation of access points is typically 120 to 130 feet ( 37 to 40 m) 2.4 band 802.11b/g propagates through floors. The 5-GHz waveform of 802.11a has approximately … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 7 : Survey Models

CCNP Wireless CUWSS 642-732 Summary Notes 6 : Safety and Aesthetics Considerations

Safety Considerations Ladder and Aerial Lift Safety - horizontal distance from the top support to the footoftheladder is about one-fourth of the working lengthoftheladder. Do not  exceed the lift maximum load, taking into account the worker, the materials, and the tools. Self-supporting (foldout) and portable ladders that are not self-supporting (leaning) must be able to support at least … Continue reading CCNP Wireless CUWSS 642-732 Summary Notes 6 : Safety and Aesthetics Considerations