CNT150:Chapter 6: Ether Channel Operation
PAgP packets are sent every ___ seconds.
30
What are some advantages EtherChannel tech?
Most configuring tasks can be done on the EtherChannel interface instead of on each individual port EtherChannel relies on existing ports Load balancing takes place between links that are port of the same EtherChannel. The types of load balancing are Source MAC and destination MAC load balancing, or source IP and destination IP load balancing You can have multiple EtherChannels between switches, but STP will put other EtherChannels in a blocked state to prevent loops EtherChannel is a logical link so even if you lose one or more physical link in the channel the topology will not be effected and the EtherChannel will not go down. The only thing that will be changed is the throughput
This mode forces the interface to channel without PAgP. Interfaces configured in the on mode do not exchange PAgp packets.
On mode
EtherChannels can be formed dynamically through negotiation using what two protocols?
PAgP LACP
This PAgP mode places an interface in a passive negotiating state in which the interface responds to the PAgP packets that it receives but does not initiate PAgP negotiation.
PAgP auto
This PAgP mode places an interface in an active negotiating state in which the interface initiates negotiations with other interfaces by sending PAgP packets.
PAgP desirable
What Cisco Proprietary protocol aids in the automatic creation of EtherChannel links.
PAgP or Port Aggregation Protocol
When using PAgP, what is sent to negotiate the forming of a channel between two swtiches?
PAgP packets
PAgP stands for what?
Port Aggregation Protocol
When an EtherChannel is configured the resulting virtual interface is called what?
Port Channel
What does PAgP and LACP allow switch ports to do?
Allow ports with similar characteristics to form a channel through dynamic negotiation with connected switches.
How does PAgP manage an EtherChannel?
Checks for configuration consistency and manages link additions and failures between two switches. It ensures that when an EtherChannel is created, all ports have the same type of configuration.
True or False? FastEthernet and GigabitEthernet links ca be combined to a single EtherChannel?
False
Which are benefits of Ether Channel tech? (Choose three) Fault tolerance load sharing increased bandwidth link redundancy
Fault tolerance load sharing increased bandwidth link redundancy
EtherChannel has certain implementation restrictions, including the following:
Interface types cannot be mixed. For example, Fast Ethernet and Gigabit Ethernet cannot be mixed within a single EthernetChannel EtherChannel can have up to 8 compatible-configured ethernet ports.EhterChannel provides full-duplex bandwidth up to 800 Mbps (Fast EtherChannel) or 8 Gbps (Gigabit EtherChannel) between one switch and another switch or host. A 2960 switch supports up to six EtherChannels, but this can change with time EtherChannel group member ports must be consistent on either be set to access mode or trunking mode with the same native vlan. A config applied to the port channel interface affects all physical interfaces that are assigned to that interface.
What is EtherChannel tech?
Is a link aggregation technology that groups multiple physical Ethernet links together into one single logical link.
What IEEE specification is 802.3ad?
LACP or Link Aggregation Control Protocol NOTE: LACP is now defined in the newer IEEE 0802.1AX standard for local an metropolitan are networks.
LACP stands for what?
Link Aggregation Protocol
The modes for LACP are as follows:
ON LACP active LACP passive
The modes for PAgP as follows:
ON PAgP desirable PAgP auto
True or False: ;It is also possible to configure a static or unconditional EtherChannel without PAgP or LACP
True
True of False: In EtherChannel,, it is mandatory that all ports have the same speed, duplex setting, and VLAN information.
True, Any port channel modification after the creation of the channel also changes the aggregated channel ports.
What are the four functions of a EtherChannel?
Used to provide Fault tolerance Load sharing increased bandwidth Redundancy Between switches, routers, and servers
Which PAgP interface mode will initiate negotiation with other interfaces? on desirable auto
desirable
What are the steps to configuring a EtherChannel with LACP?
interface range range of interfaces channel-group identifier mode active interface port-channel port-channel number interface range f0/1-10 channel-group 1 mode active interface port-channel 1
EtherChannel is a bundle of what?
of several Ethernet ports into one logical channel.
Which three are PAgP interface modes? (Choose three) on auto active passive desirable
on auto desirable
Which combinations of PAgP modes will form an EtherChannel? (choose all that apply) auto > desirable desirable > on auto > on on > on on > active active > passive
on > on auto > desirable
