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1500 questions
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1 answer

Is wifi power consumption related to password length

For wifi the Max password length is 63 characters. When I choose such a long password will this lead to notably higher power consumption of the network device (router, smartphone, ...)? I would guess that the longer the password the more effort is…
oystermanu
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1 answer

Static routes: numerical next-hop vs interface

I'm reviewing old Cisco modules, and in CCNA 2, Module 2.5.1.2, it states, Under certain conditions, the network administrator will not want to configure the static route with an exit interface but with the next-hop IP address. Why would you…
user3046
9
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1 answer

Is there any limitation of Secondary IP address number on a SVI or interface on 450x?

After a search on configuration guide and documentation, I didn't any evidence of a limitation on ip address secondaryconfiguration on a certain VLAN on 450x SUP6E. Anyone know where I can found such information or confirm if is there any ? By my…
cgasp
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2 answers

Should I use default routes or full BGP table?

I have a network with three links (ISPA, 3MB, ISPB, 1.5MB, ISPC, 50MB). I have three different speeds, and as such, ISPs A and B are primarily used for redundancy. I'm currently receiving routes from all three providers, but filtering a number of…
Couradical
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3 answers

Maximum IPv4 header size

I know the IP header length is a minimum of 20 bytes and a maximum of 60 bytes. But why? Why is the IP header length limited to 60 bytes? Is there anybody here that can explain it to me? Thank you.
ebyrock
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9
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1 answer

Juniper SRX HA links passing through switch

it is necessary to join two srx650 in chassis cluster (Passive/Active) via two switches EX4200 . I need to choose one from three examples. Please , help to define correct choice and describe what the settings should be on Srx650 and switch…
Vitaliy
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1 answer

How to provide failover for space-diversity T1

I have inherited a small, insular, dedicated network which is essentially trouble-free, so naturally I want to improve it :-) I lowered my network knowledge and savvy to somewhere around a 2 to 3 on a scale of 1-10 after reading networking posts…
Bote Man
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3 answers

Cisco Router config alternatives to Cisco SDM (i.e. no Java required)

We have an old Cisco 850 Series router hanging around here and happen to have a need for it temporarily until we get our new Palo-Alto into place. Now, after I reset it and try to pull up the configuration page at 10.10.10.1 as you would normally…
bgmCoder
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2 answers

Cisco IPSec Site-to-site VPN. Permit traffic if VPN is down

Bit of 'belt and braces' configuration planning. Background: We have a successful site-to-site VPN link to our remote datacenter. The remote 'protected' network is also the IP network range that is opened up through the firewall as Internet facing…
Rob Shepherd
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What does bandwidth (digital) really mean?

Recently I came across a new kind of NIC capable of 400Gbps (It kind of blew my mind). Does it mean it's electric circuitry is capable of serializing/deserializing (SERDES) 400G bits per second of data onto a wire while maintaining a relativley…
manish ma
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3 answers

How many stack cables would be needed if we want to stack two 3850 switches

How many stack cables would be needed if we want to stack two 3850 switches : We have one 3850 switch and planning to add one more. So my guess is only one Power & One data stack cable would be fine. Or please let me know if it is mandatory to…
shailendra harinkhede
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9
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3 answers

packet drop on 10gb/s interface

I have a certain number of packets dropped on my 10gb/s interface, on Cisco 6500 with Sup 720. You can see underneath the number of dropped packet within a minute, after I cleared the counters. We don't see any performance degradation, and none of…
user4262
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5 answers

Cascading Switches. Will it affect performance?

I am really new to large scale networking and all I know is the basics. I will be doing a network for a huge workspace consisting of multiple offices. There will be a total of 308 Clients, with at least 12 clients per office. I am following this…
Aaron Alfonso
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2 answers

Are IPv6 Wildcard Matches in Cisco IOS Possible?

Facebook is very clever with their IPv6 address scheme, but it got me thinking about ACLs and Is it possible to write a Cisco IOS IPv6 ACL that matches ? In IPv4 you could match a middle octet such as 10.xxx.10.xxx in order to hit any 'x' with…
John Spade - 'DaSpadeR'
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3 answers

Cisco can't connect to Juniper device via SSH - Invalid modulus length

I'm trying to connect from a Cisco 886VA to a Juniper EX2200 via SSH. The connection fails with the following messages on the Cisco: *Jan 17 09:51:20.823: SSH2 CLIENT 0: Server has chosen 2056 -bit dh keys *Jan 17 09:51:20.823: %SSH-3-INV_MOD:…
Sebastian Wiesinger
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