Download E-books How to Master CCNA PDF

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By René Molenaar

The right way to grasp CCNA covers every thing you must comprehend in an effort to go Cisco's CCNA Routing & Switching examination. you'll find out about the fundamentals of networking just like the OSI version, the adaptation among IPv4, IPv6, TCP, UDP and extra. additionally, you will easy methods to configure protocols like spanning-tree, VLANs and trunking in your switches and the way routers use routing protocols to construct their routing desk. This e-book covers every thing for the ICND1 (100-101), ICND2 (200-101) and CCNA mixed examination (200-120).

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What if i would like one other change to turn into root bridge? for instance SwitchA: SwitchA(config)#spanning-tree vlan 1 root basic There are tools how i will switch the basis bridge. The spanning-tree vlan root fundamental command is the 1st one. this can be a macro that appears on the present precedence of the foundation bridge and alterations your running-config to decrease your individual precedence. simply because we use PVST (Per VLAN Spanning-Tree) we will be able to switch this for every VLAN. SwitchA#show spanning-tree VLAN0001 Spanning tree enabled protocol ieee Root identity precedence 24577 tackle 0011. bb0b. 3600 This bridge is the foundation hi Time 2 sec Max Age 20 sec Bridge identification precedence 24577 ahead hold up 15 sec (priority 24576 sys-id-ext 1) GNS3Vault. com – René Molenaar bought through males VICHEAKA, menvicheaka89@gmail. com #2557060 web page a hundred and seventy of 466 How to grasp CCNA you'll discover that SwitchA is now the foundation bridge simply because its precedence has been replaced to 24576. SwitchA#show run | comprise precedence spanning-tree vlan 1 precedence 24576 in the event you examine the running-config you can find that that the spanning-tree vlan root basic command replaced the concern for us. SwitchA(config)#spanning-tree vlan 1 precedence ? <0-61440> bridge precedence in increments of 4096 SwitchA(config)#spanning-tree vlan 1 precedence 4096 altering the concern manually is the second one technique. simply kind within the spanning-tree vlan precedence command and set it to no matter what worth you love. SwitchA#show spanning-tree VLAN0001 Spanning tree enabled protocol ieee Root identification precedence 4097 handle 0011. bb0b. 3600 This bridge is the foundation hi Time 2 sec Max Age 20 sec Bridge identification precedence tackle ahead hold up 15 sec 4097 (priority 4096 sys-id-ext 1) 0011. bb0b. 3600 we will be certain this through checking the exhibit spanning-tree command once more. prior to we proceed there‟s another question…why was once the interface fa0/14 on SwitchB simply because SwitchA is now the basis bridge our spanning-tree topology seems assorted. SwitchA#show spanning-tree | Interface function Sts ------------------- ---- ----Fa0/14 Desg FWD Fa0/17 Desg FWD commence Interface price Prio. Nbr style --------- -------- ----------------------------- SwitchB#show spanning-tree | Interface position Sts ------------------- ---- ----Fa0/14 Root FWD Fa0/16 Altn BLK commence Interface expense Prio. Nbr variety --------- -------- ----------------------------- 19 19 19 19 GNS3Vault. com – René Molenaar bought by way of males VICHEAKA, menvicheaka89@gmail. com #2557060 128. sixteen 128. 19 128. sixteen 128. 18 P2p P2p P2p P2p web page 171 of 466 How to grasp CCNA SwitchC#show spanning-tree | start Interface Interface function Sts price Prio. Nbr ---------------- ---- --- --------- -------Fa0/14 Root FWD 19 128. 14 Fa0/16 Desg FWD 19 128. sixteen variety -------------------------------P2p P2p this is often the entire info we want. Let‟s replace our topology photograph… SwitchA ROOT D Fa0 17 zero/ Fa /14 D Fa0 /14 14 zero/ Fa R ND Fa0/16 Fa0/16 SwitchB NON-ROOT D R SwitchC NON-ROOT Let‟s play a few extra with spanning-tree! What if i would like to alter the basis port on SwitchB so it reaches the foundation bridge via SwitchC?

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