Link Aggregation & HSRP Flashcards

1
Q

Combine several physical links between switches to be a single logical link to increase the overall speed of switch-to-switch communication

A

Link aggregation

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2
Q

Advantages of link aggregation / etherchannel

A

Performs load balancing within the aggregated links

Provides redundancy within the aggregated links

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3
Q

What are the etherchannel protocols types ?

A

LACP (open standard)

PagP (Cisco proprietary)

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4
Q

Etherchannel Restrictions

A

Interface types cannot be mixed eg, Fast ethernet and Gigabit ethernet

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5
Q

What are the PagP modes

A

On
Desirable
Auto

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6
Q

What are the LACP modes ?

A

On
Active
Passive

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7
Q

Channel Establishment

Active/Passive - Active

A

Yes - LACP

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8
Q

Channel Establishment

On - Desirable

A

No - PagP

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9
Q

Channel Establishment

Passive/on - Passive

A

No - LACP

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10
Q

Channel Establishment

Auto/Desirable - Desirable

A

Yes - PagP

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11
Q

What is the command to check the status of Etherchannel configuration

A

S1#show etherchannel summary

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12
Q

Command to verify the interface status

A

S1#show interface port-channel <>

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13
Q

Troubleshooting Etherchannel

A

Each interface must have the same speed, duplex mode, native and allowed vlans on trunk, assigned to same vlan.

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14
Q

Cisco proprietary FHRP designed to allow for transparent failover of a first-hop IPv4 device

A

HSRP

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15
Q

Open Standard FHRP. dynamically assigns responsibility for one or more virtual routers to the VRRP routers on IPv4 LAN

A

VRPP

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16
Q

Cisco proprietary FHRP which protects data traffic from failed router or circuit allowing load balancing between a group of redundant routers

A

GLBP ( Gateway Load Balancing Protocol)

17
Q

HSRP Priority

A

Determine active router
Default priority 100
range to 0 to 255 and router with highest priority will become active

18
Q

Ability of HSRP router to trigger the re-election process

A

Preemption

19
Q

HSRP verification

A

show standby

20
Q

When a range of ports is being configured for EtherChannel, which mode will configure LACP on a port only if the port receives LACP packets from another device?

A

Passive

21
Q

Advantages of Etherchannel

A

Provides consistency in
the configuration of the physical links
Spanning tree protocol views the physical links in ehterchannel as one logical link

22
Q

Which two channel group modes would place an interface in a negotiating state using PAgP?

A

Desirable

Auto

23
Q

What are two load-balancing methods in the EtherChannel technology?

A

Source IP to destination IP

Source MAC to Destination MAC