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ccna > Cisco SDA > Flashcards

Cisco SDA Flashcards

1
Q

Cisco SDA

A

cisco software defined access

controller- cisco dnac

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2
Q

cisco dnac

A

cisco dna center. controller for cisco sda

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3
Q

overlay

A

dnac: mechanisms to create vxlan tunnels between sda switches

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4
Q

underlay

A

dnac: network of devices and connections (cable and wireless) to provide IP connectivity to all nodes in the fabric, with goal to support dynamic discovery of all SDA devices and endpoints as part of process to create vxlan tunnels

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5
Q

fabric

A

overlay+underlay

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6
Q

fabric edge node

A

connects to endpoints

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7
Q

fabric border node

A

switch that connects to devices outside sda’s control

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8
Q

fabric control node

A

performs special ctrl plane functions for underlay (LISP) requiring more CPU and memory

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9
Q

routed access layer

  1. switches l2 or l3?
  2. routing protocol?
  3. links l2 or l3?
  4. stp/rstp?
  5. DG for endpoints?
  6. hsrp/fhrp?
A 
all switches L3
all switches use IS-IS
all links L3
no
dg is sda edge node for endpoints
no
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10
Q

VXLAN tunneling performed in…

A

ASIC

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11
Q

LISP map server

A

stores info about how to reach endpoints learned from fabric edge nodes

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12
Q

DNAC southbound APIs:

  1. support trad devices
  2. support new devices
A
  1. telnet, ssh, snmp

2. netconf, restconf

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13
Q 
SDA scalable group access- steps
1. 
2. 
3.
4.
A
  1. ingress node to DNAC
  2. DNAC works with security tools in network like Cisco ISE (identity services engine) to ID users and match to SGTs (scalable group tag)
  3. DNAC checks logic
  4. permit- creat vxlan tunnel. deny- no tunnel
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14
Q

VXLAN header

A
  1. IP 2. UDP 3. SGT-source 4. SGT-dest 5. VNID- source 6. VNID- dest 7. original ethernet frame –>
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15
Q

CPI features- trad network mgmt

  1. interface?
  2. build map?
  3. how many networks?
  4. interfaces?
  5. device management timeframe?
  6. view apps?
  7. wired and wireless mgmt?
  8. software mgmt?
  9. add devices?
A
  1. single-pane-of-glass
  2. discovery, inventory, topology map
  3. whole enterprise
  4. snmp, ssh, telnet, cdp, lldp
  5. lifecycle mgmt for all devices
  6. app visibility
  7. converged wired and wireless mgmt
  8. software image mgmt (swim)
  9. plug-and-play
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16
Q 
Cisco DNAC- unique features
1. 
2.
3.
4.
5.
A
  1. easy QoS
  2. encrypted traffic analysis- recognize security threats even with encrypted traffic
  3. device 360 and client 360- view of device health
  4. Network time travel- shows past client performance in a timeline for comparison to current behavior
  5. Path trace- discovers path packets would take from source to dest based on current forwarding tables

ccna (4 decks)

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