Port Security Port security can be used to restrict which or how many hosts connect to a switch port:
Category: CCNP Notes
CCNP Notes
CCNP BCMSN Notes – IP Telephony
Power Over Ethernet (PoE) Two solutions exist to supply PoE: Cisco Inline Power (ILP) – Cisco proprietary solution developed before IEEE 802.3af IEEE 802.3af – Standard
CCNP BCMSN Notes – Router, Supervisor, and Power Redundancy
Hot Standby Router Protocol (HSRP) HSRP is Cisco proprietary, but defined in RFC 2281. HSRP routers multicast to the all-routers address 224.0.0.2 on UDP port 1985. HSRP group numbers (0 – 255)…
CCNP BCMSN Notes – Multilayer Switching
Interfaces on multilayer switch are designated as switch ports (layer 2) with switchport or routed ports (layer 3) with no switchport. Switched Virtual Interfaces (SVIs) can be defined to provide a routed…
CCNP BCMSN Notes – Advanced Spanning Tree Protocol
Rapid STP (RSTP) RSTP was developed to provide a faster converging alternative to STP, and is defined in IEEE 802.1w. Like STP, RSTP can be applied as a single instance or per…
CCNP BCMSN Notes – Protecting the Spanning Tree Protocol Topology
Root Guard If a switch with a lower bridge ID enters the network, it can preempt the current STP root. Root guard can be enabled on an interface to prevent it from…
CCNP BCMSN Notes – Spanning Tree Configuration
Root Bridge Configuration The root bridge should be positioned centrally in the network to ensure the spanning tree forms in a predictable manner. Two bridge ID formats are available: 802.1D Standard…
CCNP BCMSN Notes – Traditional Spanning Tree Protocol
STP is defined in IEEE 802.1D. BPDUs STP messages are carried by Bridge Protocol Data Unit (BPDU) frames; BPDUs are multicast to 01:80:c2:00:00:00. BPDU types: Configuration – Used for spanning-tree computation…
CCNP BCMSN Notes – Aggregating Switch Links
EtherChannel Load Balancing EtherChannel distributes load across multiple physical links by examining between one and three low order bits of an arbitrary address. XOR is used when multiple addresses are examined. Address…