ccnp
Cisco Nexus 9000 series
Deployment scenarios The Cisco Nexus 9500 Series Switches support various deployment scenarios: ● Spine nodes in a spine-leaf fabric ● Core or aggregation node in an L2/L3 network ● Border gateway in a L2/L3 network Spine-leaf fabric architecture The high port-density and ability to support multispeed ports on the same chassis make the Cisco Nexus 9500 Series Switches … Read more
Cisco Nexus – Port Channel Compatibility Requirements
switch# show port-channel compatibility-parameters port mode Members must have the same port mode configured, either E,F or AUTO. Ifthey are configured in AUTO port mode, they have to negotiate E or F modewhen they come up. If a member negotiates a different mode, it will besuspended. speed Members must have the same speed configured. If … Read more
OSPF – Packet Types
The OSPF packet types Hello packet – These packets are multicast periodically to 224.0.0.5 multicast address on all interfaces (unicast on virtual-links) enabling dynamic discovery of neighbours and maintain neighbour relationships. On broadcast and NBMA networks, Hello packets are used to elect DR and BDR. The following hello packets must match on neighboring routers to establish … Read more
OSI and TCP/IP Reference Models
Unit Layers Description Example Protocols Data Application End user layer – provides services to the software through which the user requests network services (browsers, FTP clients, and mail clients are in this layer) HTTP, FTP, IRC, SSH,DNS Data Presentation Syntax Layer – Ensures that data is in a usable format; Translates, encrypts and compresses data SSL/TLS, SSH, … Read more