Refer to the exhibit. An engineer attempts to bundle interface Gi0/0 into the port channel, but it does not function as expected. Which action resolves the issue?
A.
Enable fast LACP PDUs on interface Gi0/0.
B.
Set LACP max-bundle to 2 on interface Port-channel1.
C.
Configure no shutdown on interface Gi0/0.
D.
Configure channel-group 1 mode active on interface Gi0/0.
sw1(config-if)# do s lacp int
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting Fast LACPDUs
A - Device is in Active mode P - Device is in Passive mode
Channel group 2
LACP port Admin Oper Port Port
Port Flags State Priority Key Key Number State
Et0/1 SA bndl 32768 0x2 0x2 0x2 0x3D
Et0/3 SP hot-sby 32768 0x2 0x2 0x4 0x4
sw1(config-if)#
sw1(config-if)#
sw1(config-if)#
sw1(config-if)#do s runn interface Port-channel2
Building configuration...
Current configuration : 123 bytes
!
interface Port-channel2
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
lacp max-bundle 1
end
sw1(config-if)#
2nd port issue fixed:
sw1(config-if)#lacp max-bundle 2
sw1(config-if)#
Dec 21 21:51:58.051: %LINK-3-UPDOWN: Interface Port-channel2, changed state to up
Dec 21 21:51:59.055: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel2, changed state to up
sw1(config-if)# do s lacp int
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting Fast LACPDUs
A - Device is in Active mode P - Device is in Passive mode
Channel group 2
LACP port Admin Oper Port Port
Port Flags State Priority Key Key Number State
Et0/1 SA bndl 32768 0x2 0x2 0x2 0x3D
Et0/3 SP bndl 32768 0x2 0x2 0x4 0x3C <<<<<<<<<<<<<<<<<<<<<<<<<
sw1(config-if)#
B is correct
Hot-Standby (hot-sby): It´s already configured and synchronized with the LACP group but remains in standby mode because the LACP group has reached its maximum number of active ports.
If one of the active ports goes down, the hot-standby port can quickly transition to an active state, minimizing downtime and ensuring continued data flow.
Since the interface Gi0/0 is in hot-sby mode, we need to set LACP Max-Bundle to 2, this increases the number of active ports allowed in the port channel to 2.
D is incorrect because Gi0/0 is already in hot-standby due to max-bundle constraints, changing it to active mode won't resolve the underlying limit on the number of active ports.
This is the explanation of why B is Correct:
From Cisco:
The value specified in the max-bundle-number argument determines the number of active links that are bundled in the port channel. The remaining links are in hot-standby mode.
In the output we see 1 port as standby, therefore we must issue max-bundle 2 so both interfaces are active.
LACP (Link Aggregation Control Protocol) open (IEEE) standard. Supports more than 8links in a channel, but only 8 can be in operation and rest as standby
The answer B is correct.
LACP hot-standby port:
"When enabled, LACP tries to configure the maximum number of LACP-compatible ports in a channel, up to a maximum of 16 ports. "
https://www.cisco.com/c/en/us/td/docs/switches/blades/3020/software/release/12-2_50_se/configuration/guide/scg/swethchl.pdf
This section is not available anymore. Please use the main Exam Page.350-401 Exam Questions
Log in to ExamTopics
Sign in:
Community vote distribution
A (35%)
C (25%)
B (20%)
Other
Most Voted
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
nushadu
Highly Voted 1 year, 11 months agonushadu
1 year, 11 months agonet_eng10021
1 year, 6 months ago[Removed]
Most Recent 6 months, 1 week ago[Removed]
6 months, 2 weeks agox3rox
1 year, 10 months agoStylar
1 year, 10 months agotemphurricane1091
1 year, 11 months agomgiuseppe86
1 year, 2 months agoDanny_Xu
2 years, 1 month agoRREVECO
2 years, 2 months ago3938278
8 months agouzbin
2 years, 2 months ago