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1500 questions
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2 answers

Need help to understand whats transmited over SNMP when i use the ipNetToPhysicalEntry OID

I need a little bit of help to understand what Information the ipNetToPhysicalEntry OID 1.3.6.1.2.1.4.35.1 exactly includes. I thought its a combination between the Neighbor Cache and the ARP Cache, but when i read this OID over, lets say snmpwalk,…
eragon-2006
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4 answers

cisco 2960G won't boot and no console output

I have three Cisco 2960G switches that I pulled from a working environment. All three of them are experiencing the same problem, so I have a hard time believing they have all simply failed. Here's the problem: When I plug in the power, all the ports…
longneck
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1 answer

WIPS Alert: Reason "NoProfile" detected on AP

I'm trying to understand how I should act on a trap I'm receiving from our WLC WIPS Alert: Reason "NoProfile" detected on AP MAC: 00:1a:30:00:00:00, AP Name: West128_c3602i My searches for the meaning of this message have not turned up anything…
Mike Pennington
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6
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3 answers

LACP from Cisco 6509 to Force10 S48-10 - in default VLAN1

A client has the following configuration: The entire network is on VLAN1, with the subnet 172.16.0.0/16 - performing a redesign of their network is not an option at this point, as they're a 24/7 facility that cannot currently afford downtime (yeah,…
Panther Modern
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6
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1 answer

Connect Multiple VLANs which reside on same L3 Switch

Introduction The steps described in this manual have been applied in order to enable the connection between multiple VLANs which reside on the same switch. Two VLANs have been configured. VLAN 1: ip address 10.1.2.1 255.255.255.0 VLAN 2: ip address…
030
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6
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3 answers

Ethernet Cable Orientation

I'm in an A+ course and was just working on wiring Ethernet cables. I was wondering, will an Ethernet cable function if the wires are reversed? Say instead of wiring 568B like striped orange, orange, striped green, blue, striped blue, green, striped…
Cody
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6
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4 answers

Cisco SFP module: Determing Priority?

I have two 3750 Cisco switches that have two fiber cables/sfp modules hooked up on each. The second fiber is just for redundancy. I have installed two new 3750X switches on the rack for the upgrade, and I would like to use these existing fibers…
Keven Culp
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6
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2 answers

How to use "Pattern Recall" pattern matching in Regex

I'd like to match the 0's in this output, specifically using "Pattern Recall" feature mentioned in Cisco documentation. The pattern is: Gi4/3 0 0 0 0 Gi4/4 0 …
Pseudocyber
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2 answers

Telefonica Looking Glass?

Is there an openly accessible Looking Glass for Telefonica ? None of the "official" URL's listed hereunder point to a functional Looking Glass server http://www.telefonica-wholesale.com/es/herraIP.html (from…
user887
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3 answers

Cisco Catalyst Switch: Trunk Configuration Not Allowing Communication with multiple VLANs

I have a Cisco Catalyst Ethernet switch. I would like to setup this configuration: Ports 18 and 19 are on VLAN 10. Ports 20 and 21 are on VLAN 20. I would like port 22 to have access to both VLANs 10 and 20. Here is the configuration I made…
Bob5421
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6
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2 answers

Why do enterprise grade switches have dedicated grounding screws/lugs but home grade switches don't?

I've noticed that enterprise grade switches usually have dedicated grounding screws or lugs, but home grade switches don't. Is it just because of that fact that they will be used in different environments? Or is there any difference in internal…
vrsio
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6
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4 answers

Which is the Preferred location of an IPS within a network?

In the context of protecting a campus network, which is the Preferred location of an IPS within a network? Within an ISR router IPS as a separate device Within ASA
NAVEEN GEORGE
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2 answers

Question about the way networks are described vs their modern implementations

I am a networking student and I am currently pursuing my CCNA. I am primarily enrolled in the Cisco NetAcad. My question is in regards to how certain networks are described in these courses compared to there modern implementations. Ethernet has…
Blaarg
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6
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1 answer

MTU and MSS concept

A client and a server are separated by a router. I don't understand the principle of MSS adjustment. When the client sends a SYN packet to the server, the SYN/ack server replies with its MSS. Example: 1452 bytes So will the client send packets with…
Alan520
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2 answers

Why is MSS important? Why can't we just rely on the MTU?

Note: I understand both what MTU and MSS do so I am not asking about their function here. I understand that when a TCP connection is being established, the MSS is exchanged and it dictates the maximum size of the segment (without TCP and other…
Mitrixsen
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