12-11-2017 02:00 AM - edited 03-08-2019 01:03 PM
Hello everyone
I'm studying for 300-115 . Here are some questions. Could you help me to answer them please?
1-Which two limitations of LOCAL SPAN are true ? (Choose Two)
A. The source and destination ports must reside in the same switch or switch stack
B. It can monitor only traffic that ingresses or egresses on the source interface or VLAN
C. A SPAN session can support multiple destination ports only if they are on the same VLAN.
D. EACH SPAN session supports only one source VLAN or interface.
E. A switch can support only one local SPAN session at a time.
I think AC
2-Which two restrictions of the port security feature are true? (Choose two.)
A. Static port MAC address assignments are not supported.
B. It is not supported on PVLAN ports.
C. It is not supported on EtherChannel port-channel interfaces.
D. A single device can learn a maximum of three sticky MAC addresses.
E. It is supported on destination SPAN ports.
I don't know, all options look wrong :)
12-11-2017 02:24 AM
12-11-2017 02:51 AM - edited 12-11-2017 02:54 AM
Characteristics of Local SPAN
Destination Ports Each local SPAN session must have at least one destination port (also called a monitoring port) that receives a copy of traffic from the source ports or VLANs.
So C looks Okey in question 1 ( At least means it can have one or more )
Look at Page 2 pleas. Port Security supports access and trunk etherchannel interfaces .
12-11-2017 02:53 AM
12-11-2017 02:59 AM
12-11-2017 04:18 AM - edited 12-11-2017 04:23 AM
Hello again Mark
Thank you for replying .
I send you a link in there port-security supports access and trunk ether-channel
In second picture you can see Local SPAN configuration
Both links are from Cisco . I also agree you but it's just making me confuse.
I'm a real critic of Cisco documentation and feature navigation for this kind of problems
12-11-2017 04:25 AM
12-11-2017 08:56 AM - edited 12-11-2017 09:49 AM
As you said, here are 2 different documents from Cisco in which, these question can not be answered!
Let's hope the questions are old enough to be removed from exam.
I'll try to find more clear answers in 300-115 E-book .
Thanks a million
UPDATE:
300-115 says you can have only one destination!
Could you please explain me why you choose B as correct option ( default direction in span is BOTH )
03-27-2018 08:41 PM
Hi,
I work for Cisco and wanted to let you know that the document that you referenced in b.png is for the Nexus 1000 switches. This is a datacenter technology, however the original question is in reference to Switch 300-115 which is a Route/Switch test. R/S questions relate to the catalyst series switches. This is probably why their is some confusion with certain documents saying one thing and others saying the opposite.
A is correct and C is eliminated per:
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/10570-41.html#anc11
Each local SPAN session or RSPAN destination session must have a destination port (also called a monitoring port) that receives a copy of traffic from the source ports and VLANs. ( You kind of have to read between the lines but does not indicate VLAN as a destination possibility)
A destination port has these characteristics:
A destination port must reside on the same switch as the source port (for a local SPAN session).
A destination port can be any Ethernet physical port.
A destination port can participate in only one SPAN session at a time. A destination port in one SPAN session cannot be a destination port for a second SPAN session.
A destination port cannot be a source port.
A destination port cannot be an EtherChannel group.(Can be a port in a channel group but will then will not be used by the EtherChannel as destinations cannot send/ recieve any traffic other than the SPAN traffic)
B is incorrect per:
The default configuration for local SPAN session ports is to send all packets untagged. SPAN also does not normally monitor bridge protocol data unit (BPDU) packets and Layer 2 protocols, such as Cisco Discovery Protocol (CDP), VLAN Trunk Protocol (VTP), Dynamic Trunking Protocol (DTP), Spanning Tree Protocol (STP), and Port Aggregation Protocol (PAgP). However, when you enter the encapsulation replicate keywords when configuring a destination port, these changes occur:
E is eliminated as the number of SPAN sessions is actually switch dependent:
D is the only other answer left and should be correct through process of elimination.
03-27-2018 08:48 PM
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