The Company network administrator needs to enable VTP pruning within the Company
network. What action should a network administrator take to enable VTP pruning on an
entire management domain?
A.
Enable VTP pruning on any switch in the management domain
B.
Enable VTP pruning on any client switch in the domain
C.
Enable VTP pruning on a VTP server in the management domain
D.
Enable VTP pruning on every switch in the domain
E.
None of the other alternatives apply
Explanation:
The default behavior of a switch is to propagate broadcast and unknown packets across the
network. This behavior results in a large amount of unnecessary traffic crossing the network.
VTP pruning increases bandwidth efficiency by reducing unnecessary flooding of traffic,
such as broadcast, multicast, unknown, and flooded unicast packets. VTP pruning increases
available bandwidth by restricting flooded traffic to those trunk links that the traffic must use
to access the appropriate network devices. By default, VTP pruning is disabled.
Enabling VTP pruning on a VTP server enables pruning for the entire management domain.
VTP pruning takes effect several seconds after it is enabled. By default, VLANs 2 through
1000 or 2 through 1001 are pruning eligible, depending upon the platform. VTP pruning does
not prune traffic from VLANs that are pruning ineligible. VLAN 1 is always pruning ineligible
and VLAN 1 cannot be removed from a trunk. However, the “VLAN 1 disable on trunk”
feature available on Catalyst 4000, 5000, and 6000 family switches enables the pruning of
user traffic, but not protocol traffic such as CDP and VTP, for VLAN 1 from a trunk. Use the
vtp pruning command to make VLANs pruning eligible on a Cisco IOS-based switch.
Switch(vlan)#vtp pruning
Once pruning is enabled, use the switchport trunk pruning command to make a specific
VLAN pruning ineligible.
Switch(config)#interface fastethernet 0/3
Switch(config-if)#switchport trunk pruning vlan remove vlan 5
The notes doesn’t really explain why, however this does:
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-1_19_ea1/configuration/guide/3550scg/swvtp.html#wp1072526
Enabling VTP Pruning
Pruning increases available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to access the destination devices. You can only enable VTP pruning on a switch in VTP server mode.
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I think the dumps are very good for the people who do not have much time for their Cisco 300-115 exam preparation. You can easily pass the exam only by memorize the exam questions. Believe or not, I did so and I passed my 300-115 exam:
QUESTION 251
What is cisco recommendation for RSPAN best practice?
A. you should configure remote vlan first
B. use different vlan for multiple/different switches
C. use different portchannel
Answer: A
QUESTION 252
What is needed for Virtual Switching System “VSS”?
A. portchannel
B. trunk
C. Virtual Switching Link “or VSL”
Answer: C
QUESTION 253
Which will identify the master switch in stack wise?
A. lower priority
B. higher priority
C. lower id
D. higher id
Answer: B
QUESTION 254
What happens if you apply this command “vlan dot1q tag native” ?
A. packet will be dropped
B. packet go to defautl vlan
C. packet go to native vlan
Answer: C
QUESTION 255
A Switch has been configured with the Vlan dot1q tag native command.
Which statement describes what the switch does with untagged frames that it receives on a trunked interface
A. Untagged frames are forwarded via the default VLAN
B. it drops the untagged frames
C. The trunked port is put in err-disabled state
D. Untagged frames are forwarded via the native VLAN
Answer: D
QUESTION 256
An engineer is configuring an EtherChannel between two switches using PAgP If the EtherChannel mode on switch 1 is configured to auto, which modes on switch 2 establish an operational EtherChannel?
A. active
B. auto
C. desirable
D. on
E. passive
Answer: C
QUESTION 257
switch#show standby
Virtual IP address is X.X.X.X
Hello time 3 sec, hold time 10 sec
Preemption disabled
Active router is X.X.X.3 priority 85
Standby router is local
Priority 90 (configured 90)
Track interface faX/X state decrement 10
(Choose two)
A. The link will take over when …..
B. X.X.X.3 is active becuse it has higher IP address
C. when faX/x is down praiority will be 80
D. it is using default hello and hold values
Answer: CD
QUESTION 258
Question about trunk configuration
int faX/X
switchport trunk allowed vlan x,x,x,x
switchport mode trunk
exit
show vlan
VLAN Name Status Ports
— ——————–?—— ———————
1 default active Fa0/1, Fa0/3, Fa0/3, FaX/X
show interface trunk
(no output)
A. link is shutdown
B. interface needs no shutdown
C. other side is configured as access port
D. missing switchport command
Answer: A
QUESTION 259
What happens spoofed packet or something like untrusted packet is detected? (Choose three)
A. log
B. deletes
C. intercepts
D. accepts
E. discad
Answer: ACE
QUESTION 260
Refer to the exhibit. An engineer is configuring an etherchannel between two switches, he notices the error message on Switch 2 (error message channel-missconfiguring error), based on the output what is the problem?
A. the etherchannel on the switch 1 using incorrect member port
B. the etherchannel interface of switch 1 is not configured
C. the etherchannel protocol on switch 1 is not correct
D. the etherchannel interface of switch 2 is not configured
Answer: C
QUESTION 261
Drag and Drop Question
A. See the exhibit
Answer: A
QUESTION 262
Drag and Drop Question
A. See the exhibit
Answer: A
QUESTION 263
When using EtherChannel misconfiguration guard, which technology is used to prevent this type of misconfiguration from affecting the network?
A. LACP
B. port security
C. STP
D. PAgP
Answer: A
QUESTION 264
What is the Ethernet frame size for 802.1Q?
A. 64
B. 128
C. 1518
D. 1522
Answer: D
QUESTION 265
How will the traffic reach the core switch from AS switch to DS core switch?
(Based on a topology shown with one core, two distribution and two access switches on each distribution switch, with redundant links and bandwidth mentioned.)
A. ASW1 to DWS1 to core
B. ASW1 to DWS2 to core
Answer: B
QUESTION 266
If HSRP group number is 45 what would be the MAC address?
(Basically conversion of digit to hexadecimal with group of 16.)
A. 00-00-0c-07-ac-2D
Answer: A
Explanation:
00-00-0c- 07-ac-2D
CISCO_ID :HSRP_ID:GROUP_ID
2d=45
QUESTION 267
EtherChannel guard misconfig is configured on a switch, which technology supports that?
A. LACP
B. PagP
C. STP
D. Port Security
Answer: C
QUESTION 268
Select a valid VRRP configuration from a list of possible configurations.
A. vrrp [group-number] ip [ip-address]
B. vrrp [group-number] priority [priority]
C. vrrp [group-number] preempt
Answer: ABC
Explanation:
You can eliminate configurations with the word `standby’, as that would be HSRP, not VRRP. Also, I think the options that put things like vrrp group 1 ip x.x.x.x are wrong.
You don’t need the word `group’ in the configuration line. The number 1 is the group number. Anyway, just take a good look a t a few valid VRRP configuration examples so that you will be able to recognize invalid ones.
QUESTION 269
Private VLANs (PVLANs) have two secondary VLAN types.
A. community
B. isolated
Answer: AB
QUESTION 270
What types of SDM templates you can use in switch? (Choose four)
A. Access
B. Default
C. Routing
D. VLANs
Answer: ABCD
Explanation:
+ Access – The access template maximizes system resources for access control lists (ACLs) to accommodate a large number of ACLs.
+ Default – The default template gives balance to all functions.
+ Routing – The routing template maximizes system resources for IPv4 unicast routing, typically required for a router or aggregator in the center of a network.
+ VLANs – The VLAN template disables routing and supports the maximum number of unicast MAC addresses. It would typically be selected for a Layer 2 switch.
QUESTION 271
What is the process to configure EtherChannel?
A. shutdown both interface ports
B. shutdown the interface on one side only
Answer: A
QUESTION 272
A question about spanning-tree port-priority.
A. 128
B. 129
Answer: A
QUESTION 273
Spanning-tree EtherChannel misconfiguration
A. (config)#spanning-tree etherchannel guard misconfig
B. (config-if)#spanning-tree etherchannel guard misconfig
Answer: A
QUESTION 274
There was another Exhibit about port priority- Core switch connected to 2 dis switches which connected 2 ASW. PC1 is connected to DSW1 and DSW2 (Root Bridge). Link connected from PC1 to DSW2 is 4Gbps and DSW1 is 10Gbps. There is etherchannel trunk between DSW1 and DSW2. Default port prioirty is configured.
Change in port priority so traffic goes through DSW1 to DSW2
A. DSW1: spanning-tree port priority 16
B. DSW1: interface g1/0
C. DSW2: spanning-tree port priority 16
D. DSW2: interface g1/0
E. DSW1: spanning-tree port priority 0
Answer: AB
QUESTION 275
If EtherChannel guard is configured, how the interface status is (or looks like) if misconfigured?
A. errdisabled
B. shutdown
……
More questions are on my blog: http://itexams.org/?s=300-115
Hope it can help u a lot!
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