Can be applied to either a router or switch CLI; router(config-if)# auto qos voip # enable and configure it on the interface router(config-if) or (config-fr-dlci)# auto qos voip [trust] [fr-atm] # configures the AutoQoS feature (untrusted by default) on routers console> (enable) set qos autoqos …

The modular QoS CLI (MQC). MQC step 1 allows us to create various classifications (class map) MQC step 2 allows us to create a policy (Policy Map) MQC step 3 apply a policy to an interface (inbound or outbound) (Service Policy) Class Maps; categories of traffic contains 3 major elements; case …

AutoQoS Enterprise not just focused on VoIP but also video and data traffic (up to 10 classes of traffic – Cisco Best practice). Typically for medium sized companies CLI; router(config-if) or (config-fr-dlci)# auto discovery qos [trust] #configures the discovery phase by gathering stats via NBAR …

Uses RSVP to revers bandwidth Service garantee is end-to-end Can perform CAC RSVP uses various mssage types to setup; PATH Message (from the initiator) RESV Messgage (back towards the sender) TEARDOWN Messgae (from either sender or reciever) There are 3 types of QoS services offered by RSVP, …

Methods to implement QoS; CLI MQC AutoQoS VoIP (voice QoS) AutoQoS Enterprise (voice, video and data QoS) QPM MQC (Modular QoS CLI) proccess Classify traffic Whats going to happen to the classes of traffic Assign to interface AutoQoS VoIP CLI – auto qos voip [trust] AutoQoS Enterprise CLI – auto …

Terminology; Behaviour Aggregate (BA): A collection of packets with the same DSCP crossing a link in a particular direction Differantiated Services Code Points (DSCP): A value in the IP header used to select a QoS treatment for a packet Per-hop behaviour (PHB): The externally observable forwarding …

Characteristics that QoS can effect; Bandwidth Delay Jitter (Delay Variation) Packet loss QoS Tools that effect bandwidth; Compression CAC (Call Admission Control) Queuing Types of delay; Serialisation (fixed) Propogation (fixed) Queuing (variable) Forwarding/Processing (variable) Shaping (variable) …

Occasionally, during bootup of Cisco hardware through Cisco IOS software, error messages similar to these are displayed: %Error opening tftp://255.255.255.255/network-confg (Socket error) %Error opening tftp://255.255.255.255/cisconet.cfg (Socket error) %Error opening …

IP range is 224.0.0.0 – 239.255.255.255 Well known link local addresses assigned by IANA (reserved use of 224.0.0.0 – 224.0.0.255; 224.0.0.1 – All Multicast systems on a subnet 224.0.0.2 – All routers n subnet 224.0.0.4 – All DVMRP routers 224.0.0.13 – All PIMv2 routers 224.0.0.5 – OSPF routers …

All routers auto learn RP address configuration necessary only on candidate RP & Mapping agent Multicasts ae used to distribute RP information Cisco announce: 224.0.2.39 Cisco discovery 224.0.1.40 Fowarded in Dense Mode