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CCNP Switch > CCNP switch slides 14 > Flashcards

CCNP switch slides 14 Flashcards

1
Q

source

A

http://www.coursehero.com/flashcards/430757/CCNP-SWITCH-642-813-High-Availability/

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2
Q

What is the command to view HSRP information on a device?

A

show standby

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3
Q

What is the hello timer in VRRP?

A

1 second.

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4
Q

What is the number range that can be assigned to HSRP groups?

A

0-255, but most switches only support up to 16.

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5
Q

What happens if two switches have the same HSRP priority values within a group?

A

The switch with the highest IP address takes over the active state.

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6
Q

What is the default GLBP MAC address scheme?

A

0007.b4xx.xxyy where xx.xx is the hex group-id and yy is the AVF number.

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7
Q

What are the three load-balancing methods used by GLBP and what is the default method?

A

Round-robin (default!), Weighted, and Host Dependent.

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8
Q

What is the default key-string used with HSRP devices?

A

‘cisco’

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9
Q

What are the three states that a Switch running HSRP can end up in?

A

Active, Standby, and Listen.

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10
Q

What are the fail-over times for the following redundancy modes: RPR, RPR+, SSO?

A

-RPR >2minutes-RPR+ >30seconds-SSO >1second

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11
Q

What is the range for an HSRP Priority value, what is the default, and what values are better?

A

0-255, default is 100, and higher values are better.

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12
Q

Can you preempt in GLBP?

A

Yes!

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13
Q

What two conditions MUST be met for another switch to take over the active role in HSRP?

A

-The switch must have a higher HSRP priority.-The switch must use the preempt command.

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14
Q

What is the default hello and hold-down timers for HSRP and what are the ranges for these values?

A

The default hello is 3 seconds, and the default hold-down is 10 seconds. The hello timer can range from 1-254 seconds or 15-999 milliseconds, and the hold-down timer can range from 1-255 seconds or 50-3000 milliseconds.

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15
Q

What are the three ways that HSRP can authenticate message exchanges?

A

-Plain-text authentication strings-MD5 key-strings-MD5 key-chains

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16
Q

What command allows an HSRP switch to immediately take over the active role, and in what ways can you delay this process?

A

The Preempt command, and you can give a minimum delay of 0-3600 seconds, or the reload delay of 0-3600 seconds.

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17
Q

When it comes to switch redundancy, what is NSF?

A

Non-Stop Forwarding. It is a method that focuses on rebuilding the Routing Information Base after a supervisor switch-over.

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18
Q

Can you track interfaces with GLBP?

A

Yes!

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19
Q

Why is no subnet given when assigning a standby address?

A

-Because the standby address must belong to the same IP subnet as the primary address.

20
Q

What First Hop Redundancy Protocols are Cisco Proprietary?

A

HSRP and GLBP

21
Q

Where must you explicitly configure the IP address on an GLBP group?

A

On the device you want to be the AVG.

22
Q

What are the three types of First Hop Redundancy Protocols?

A

-HSRP, Hot Standby Router Protocol-VRRP, Virtual Router Redundancy Protocol-GLBP, Gateway Load Balancing Protocol

23
Q

What does the track command do in HSRP and what is the default value of this action?

A

It monitors another interface, and if that interface should fail, it will decrease the HSRP group priority value by a default of 10.

24
Q

What routing protocols are supported by NSF?

A

-BGP, EIGRP, OSPF, IS-IS

25
Q

How does Preempt work on VRRP?

A

All VRRP devices are configured to automatically preempt if they have a higher priority.

26
Q

Can HSRP groups with the same group-id exist on the same VLAN? How about different VLANs?

A

HSRP groups must be unique WITHIN a VLAN. Different VLANS can use the same group-ids without any problems.

27
Q

What is the range and default value of the VRRP priority?

A

1-254, default is 100.

28
Q

In GLBP, what are devices that have one of the 4 virtual MAC addresses called?

A

AVF - Active Virtual Forwarders.

29
Q

What is the weight range and default value in GLBP?

A

1-254, and defaults to 100.

30
Q

What are the three redundancy modes used on Catalyst switches with more than one supervisor?

A

-RPR(Route Processor Redundancy ->Cold standby)-RPR+(Route Processor Redundancy+ ->Warm standby)-SSO(Stateful Switch Over ->Hot standby)

31
Q

In GLBP what is used to determine if a device will become the AVF for a group?

A

The Weight function.

32
Q

In GLBP, what happened to timer value changes when placed on the AVG?

A

They will propagate to all other devices in the GLBP Group.

33
Q

What are the 6 HSRP negotiating states?

A
  1. Disabled2. Init3. Listen4. Speak5. Standby6. Active
34
Q

What is the MAC address for VRRP interfaces?

A

0000.5e00.01XX Where XX is the hex value of the VRRP group-id.

35
Q

Will changes on a single switch’s HSRP timers affect other HSRP switches in the same group?

A

No, times must be configured on each switch manually!

36
Q

Can you track another interface in VRRP?

A

Nope.

37
Q

What is the job of the AVG in GLBP?

A

The AVG responds to ARP requests from clients to their default gateway with a unique MAC response in order to load balance across the network.

38
Q

In GLBP devices use the same ___ address, but have different _____ addresses.

A

IP, MAC

39
Q

What is the default MAC address for HSRP gateways?

A

0000.0c07.acXX where XX represents the hex value of the HSRP group-id.

40
Q

What is the command to show VRRP information on a device?

A

show vrrp

41
Q

How many virtual MAC addresses can be used in a GLBP group?

A

4

42
Q

What are the default hello and hold-down timers with GLBP, and their ranges?

A

-Hello timer default is 3 seconds, and ranges from 1-60 seconds or 50-60000 milliseconds.-Hold-down defaults to 10 seconds, and ranges from 1-180 seconds or 150-180000 milliseconds.

43
Q

What are the ranges and default values of GLBP group numbers and device priorities?

A

Group numbers range from 0-1023, and priorities range from 0-255 with 100 being the default. Higher is better.

44
Q

What are the two device states in VRRP?

A

Master and Backup

45
Q

In a GLBP group, how does a device get elected as the AVG? And what is an AVG?

A

The device must have the highest priority value, or the highest IP address in the event of a tie. AVG = Active Virtual Gateway.

CCNP Switch (16 decks)

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