What's Arista 7500N?

new revision of 7500R? What exactly changed or this is just a P/N change for bundle products

I can't tell to find much about this chassis other than 7512N and 7516N takes only 7500R LC

Cisco WLC quick question

Will removing a WLAN from an AP Group cause APs to reboot or clients to be dropped off?

(Never sure when to expect this type of behaviour in Cisco WLC)

Are there any free online supplementary lectures or video series to go along with my "CCENT/CCNA ICND1 100-101" book by Odom?

I'll be honest, it all seems extremely daunting. I'm new to the networking world but it's fascinated me for a while. I've decided that at the end of the year when I graduate uni, I plan on getting my CCENT and CCNA.

But I feel like I won't gain as much knowledge as possible just from reading the book on my own. I like having someone there to explain the concepts and things I get confused on. But I also don't want to spend hundreds of dollars just to buy a lecture series online or anything like that. I prefer to keep my spending to a minimum.

Also, what's the best way to take notes? What I mean by this is: How can I take in as much info as possible and still know what I need to to pass? Because I've heard about some people who only read the material for like a few months and still pass with flying colors.

Transceiver, SFP, 1GbE, ZX, 1550nm compatibility

My knowledge regarding transceivers , fiber is basic so please help me in this one. I have a site with a Cisco 1000BASE- LH SFP.

1000BASE-LH9/125 Single mode fiber1310nm25~70km

And I have this transceiver

Transceiver, SFP, 1GbE, ZX, 1550nm Wavelength, 80km Reach typical on 9/125um SMF

Is this kind of configuration valid? those 2 transceivers will work? or this is not a valid configuration? I need the same transceivers in both sites?

Upgrading call manger broke our ability to dial into VC systems

I had the pleasure of upgrading Call Manager to 12.0.1. Other than being the most time consuming thing on the planet, it was mostly smooth sailing. A few hiccups here and there with the main issue at the time being that after someone transferred calls, the person who received the transfer was unable to hear the caller.

Now the main issue is that dialing into a VC system does not register the end users key selections. As in when they dial in and the systems prompts them for a meeting id, its not registering their key inputs.

Any thoughts on where to start looking for this? VOIP stuff isn't my strong suit.

N7K memory upgrade, does it break VPC?

Does this break VPC if the peers have different memory levels due to step by step upgrade? Everything I Find talks about dual sup but not VPC peers. My assumption is it should be okay.

Best practices for advertising loopbacks, P2P connections, and customer-assigned addressing in BGP?

So, how do ISPs typically advertise their own internal address space in BGP? By internal address space, I mean to say: loopbacks, customer P2P connections, and customer assigned addressing. Given that I doubt anyone accepts prefixes longer than a /24, I assume these have to be aggregated into a larger network and then advertised as a single prefix (ex: 12.0.0.0/9 for AT&T).

What I'm not sure of, however, is where to aggregate these routes at, and how. Do you do an BGP aggregate address on every edge router? Do you redistribute a static route to null0 on every edge router? Or do you generate these routes on only a few core routers? Is there some other way that I'm not considering?

Also, do you insert the longer prefixes into your BGP routinig table at all? Or do you keep them strictly in the IGP?

Network Support Engineer Interview

Hi everyone, I have an interview coming up this week for a network support engineer position and am really hoping to do well on it.

How should I prepare for the interview? What specific topics should I be an expert, knowledgeable, or familiar about? Are there any resources you guys know of that would be helpful? Thanks!

CPU Help

Were using brocade MLX chassis and keep getting high CPU spikes and random times during the day. The process that is using all of the CPU is the LP-IPC process. Any tips on how to resolve it?

LP-1 OS>sh cpu

Name State Act Wait Hold Time CPU

$(idle) - A 0 0 3353 0.7

$con ready A 0 0 513 0.1

$mon wait A 0 0 14 0.0

$flash ready A 0 0 14 0.0

$dbg wait A 0 0 10 0.0

main wait A 15 55 93353 43.2

LP-I2C wait A 0 0 0 0.0

LP-Assist wait A 0 0 0 0.0

LP-FCopy wait A 0 0 0 0.0

LP-VPLS-Offld wait A 0 0 0 0.0

LP-OF-Offld wait A 0 0 0 0.0

LP-TM-Offld wait A 0 0 0 0.0

LP-IKE wait A 0 0 6 0.0

LP-Stats wait A 118 2 396 0.0

LP-IPC ready A 62 16 320363 55.5

LP-TX-Pak ready A 121 0 487 0.0

LP-RX-Pak ready A 121 10 6581 0.5

LP-SYS-Mon wait A 102 0 8 0.0

LP-RTD-Mon wait A 57 0 46 0.0

LP-Console wait A 0 0 0 0.0

SLOT #: LP CPU UTILIZATION in %:

in 1 second: in 5 seconds: in 60 seconds: in 300 seconds:

1: 92 98 99 99

2: 93 98 99 99

3: 99 99 99 99

4: 99 99 99 99

5: 99 99 99 99

16: 95 99 99 99

Dual MPLS with additional Metro E WAN configuration

If anyone can please provide me some insight on a best practice or use case configuration for the following scenario:

We currently have a network with 15 ritical Remote Sites which all have a dual MPLS connection (Verizon/ATT). VZ is configured as our primary MPLS and ATT runs as a backup. We have 1 router per SP (two in total) which redistribute into OSPF with metric defined to prefer VZ. The VP for our company decided to add in a Metro E connection in addition to the dual MPLS connecting 2 of these critical sites (without consulting anyone from the network team). When I asked the reason for this new circuit I was told "to create a triangle".

My current dilemma lies in that now I'm being contacted by the vendor or details on how to configure the p2p such as do I want vlan tagging or not etc. and I have no idea what the purpose for this circuit is (other than creating a triangle). My only guess is that that in the event that the 2 MPLS circuits fail at one site the P2P circuit could be used as a backup transit for the other site to access resources?

Given that my company's VP is expecting me to read his mind and give him the solution that he wants to hear magically, I'm going to assume my initial guess is the use case definig this order. My questions are how should I introduce this into my network? Should I bring in an aditional device to terminate the ciruit or should I use an interface on either of my MPLS routers, or connect direct to my core? Once the termination point is determined I was thinking a floating default route one the core would be the simplete configuration.