Tags cbwfq cos llq policing qos shaping tos WRED For an example a VoIP traffic adheres to low latency and guaranteed delivery with a low amount of bandwidth unlike a FTP traffic adheres more BW. QOS is a technique to prioritize important traffic over less important traffic based on the class and characteristics of the traffic. There is a long story behind the development of DSCP and… DSCP, Precedence(IP Header) DSCP and Precedence is a part of IP Header TOS field. Tags burst phb policing qos shaping token-bucketĬlassification & Marking are some technique to identify traffic types and segregate them by defining specific values in some additional fields of the IP/Frame Header. The way shaping and policing rate-limit traffic… Both is used to rate limit traffic on a interface or sub-interface to adhere to a traffic contract or to restrict further congestion of traffic down to the remaining network devices. Shaping and Policing is a Traffic Condition Technique comes under QoS PHB.
DOWNLOAD CISCO ASAV IMAGES FOR GNS3 SOFTWARE
Control Place the the logical unit of the hardware which perform the software operation like routing protocol(ospf, bgp, ldp etc.).
Tags add path additional path bgp pic multipath Tags BGP Distance bgp-path-selection iBGP over EBGP prefer iBGP over EBGP If the rote is locally originated then it will prefer ibgp path, otherwise it will chose ebgp path. In a situation where a route coming from both ebgp and ibgp peer, the best path election will takes place in two different way. Tags bgp-pa bgp-path-attribute bgp-path-selection path-attribute The second Round is Selection where BGP Best… The first round is Rejection where any route matching certain condition will be rejected.
There are 3 (Rejection, Selection, Tie-Break) rounds of BGP Path Selection which involve 18 different steps. In this discussion we will dive into the BGP Path Selection Algorithm. Tags bgp-fsm bgp-input-events bgp-message-types bgp-stuck-in-active BGP is a Transport Layer Protocol, hence TCP provides fragmentation, acknowledgement, sequencing… Before establishing BGP Peer Connection, two neighbor must perform TCP Three-Way-Handshake and open a connection to Port number 179. In this tutorial we will discuss about different message types of BGP, BGP Peer Connection, BGP Finite State Machine. Tags bgp bgp-fsm bgp-stuck-in-active bgp-stuck-in-idle Refer the below flow chart where it explains… It's a Cisco proprietary and use to enable fast DR recovery in a multi-access network.īGP Neighbor States – IDLE – CONNECT – ACTIVE From this explanation we might understand that a BGP process remains in ACTIVE state is due to TRANSPORT ERROR means the BGP process is unable to initiate a TCP Connection to the Neighbor. Remembering old DR is an optimization of DR/BDR election process. Introduction - Preemption vs Remember OLD DR. Tags backup area isolated area multiarea adjacency ospf partitioned area Tags external loop prevention inter area loop prevention ospf loop prevention Tags external-lsa forwarding-address ospf Tags N/P Bit nssa nssa-area ospf p-bit Propagate Bit
Its is called propagate bit, when set to 0(zero/Unset), NSSA ABR doesn't translate the Type-7 to Type-5, otherwise the NSSA ABR translate the Tyep-7 to Type-5 Tags dhcp dhcp ack dhcp discover dhcp lease dhcp offer dhcp reuest dhcp transaction id dhcpdecline dhcpinform dhcpnak dhcprelease doraĪ NSSA ABR Translate Type-7 LAS to Type-5 LSA based on the value of P-Bit. Clients/Hosts send request to DHCP servers… DHCP essentially uses BOOTP message format added with some options filed using UDP(Port 67 & 68). It is an extension of BOOTP protocol and backward compatibility is maintained. DHCP is a client/server protocol used to assign configuration(ip, gateway, dns, options etc.) to hosts dynamically.
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