24 - Implementing EIGRP for IPv6 Flashcards

1
Q

What troubleshooting steps should you take when a router has a suboptimal path to a destination?

A

1) check neighbor relationships all along the optimal path
2) check interface bandwidth and delay settings. Give special attn to lowest bandwidth along the path since EIGRP will use that to calculate metric.

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2
Q

What ‘show’ command will display passive interfaces?

A

show ipv6 protocols

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3
Q

What 3 ‘show’ commands can be used to see EIGRP topology?

A
  • show ipv6 eigrp topology
  • show ipv6 eigrp topology (subnet/prefix)
  • show ipv6 eigrp topology | sec (subnet/prefix)
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4
Q

What will happen if bandwidth or delay settings are changed on an interface?

A

It will change those values for BOTH ipv4 AND ipv6

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5
Q

What 5 values must match before two EIGRP routers become neighbors?

A
  • interfaces must be up/up
  • ACLs must not filter EIGRP traffic
  • must pass authentication if enabled
  • ASNs must be the same
  • K values must match
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6
Q

What command changes the Hello timer?

A

(interface cmd) ipv6 hello-interval eigrp (asn) (value). Ex. Ipv6 hello-interval eigrp 2 10

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7
Q

What 4 ‘show’ commands can be used to see EIGRP routes?

A
  • show ipv6 route
  • show ipv6 route eigrp
  • show ipv6 route (subnet/prefix)
  • show ipv6 route | sec (subnet/prefix)
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8
Q

What troubleshooting steps should you take when a router is missing a route?

A
  1. Check directly connected interface to missing network to make sure EIGRP is enabled correctly
  2. Check to make sure neighbor relationships exist all along the path
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9
Q

How do you explicitly set the router ID for EIGRP for IPv6

A

(router cmd) eigrp router-id 2

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10
Q

What 3 ‘show’ commands can be used to see EIGRP neighbors?

A
  • show ipv6 eigrp neighbors
  • show ipv6 eigrp neighbors gig0/0
  • show ipv6 protocols
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11
Q

What command changes the Hold timer?

A

(interface cmd) ipv6 hold-time eigrp (asn) (value). Ex. Ipv6 hold-time eigrp 2 10

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12
Q

What is the feasibility condition?

A

the metric reported by the neighboring router must be lower (better) than that of the local router

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13
Q

How do you enable and disable EIGRP without changing the EIGRP configuration?

A

(router cmd) ‘shutdown’ and (router cmd) ‘no shutdown’

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14
Q

What 2 things does EIGRP attempt to do when enabled on an interface?

A
  • discover and become neighbors
  • advertise that interface’s network
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15
Q

Will two routers be prevented from becoming neighbors if their router IDs are the same?

A

No

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16
Q

What command enables EIGRP for IPv6 on an interface?

A

(interface cmd) ipv6 eigrp (asn)

17
Q

What 4 ‘show’ commands can be used to see EIGRP-enabled interfaces?

A
  • show ipv6 eigrp interfaces
  • show ipv6 eigrp interfaces detail
  • show ipv6 eigrp interfaces gig0/0
  • show ipv6 protocols
18
Q

Do IPv6 EIGRP neighbors need to be on the same subnet?

A

No

19
Q

Do timers need to match on two routers in order for them to become neighbors?

A

No

20
Q

When looking at a neighbor table how are neighboring routers identified?

A

By their Link-Local address

21
Q

As a minimum what are the two commands needed to bring up EIGRP for IPv6?

A
  • Global cmd) ipv6 router 2
  • (interface cmd) ipv6 eigrp 2