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1500 questions
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3 answers

Is QoS an issue for VOIP calls over the Internet? If not, why not?

I'm trying to decide whether I should buy SIP trunks from my ISP or a 3rd-party. As I understand it, it's important to maintain QoS on an internal network (i.e. prioritize VOIP traffic). Is this not also true on a public network? My ISP says that…
Travis
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9
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How to break apart an IPv6 /56 6rd delegated prefix from ISP into multiple /64 VLANs for use with SLAAC EUI-64? [Cisco]

I have CenturyLink Internet service, and they have a 6RD IPv6 deployment where they hand out an IPv6 delegated prefix /56 block to me and allow me to use it as I wish. My Cisco ISR router receives the /56 delegated prefix. I have multiple VLANs and…
OpenHorseSoftware
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4 answers

Overcome 2 monitor session limitation in Cisco VSS

Is there a way to overcome Cisco's 2 monitor session limitation on a VSS 6500 without the use of a network tap?
henklu
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9
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2 answers

Label to Route mapping, Label generation scalability

In MPLS enabled routers, is a unique label generated per Destination prefix in routing Table or is it per Next-hop in the routing table if not both, how is the mapping between unique labels and routing table entry ? Also, if it is per Destination…
Hemanth
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9
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4 answers

What is the advantage of an "area" in OSPF configuration?

As we know, during OSPF configuration we use the area. Each area has its different number, while there is only one area (area 0) which creates communications between all other attached areas. I am confused that as we are using the same…
Fahim Shah
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9
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1 answer

What path does a packet follow through a Cisco Nexus 5k/2k infrastructure?

I was told by someone that a packet going between two hosts connected to the same Nexus 2k would end up being passed all the way up to the 5k that is managing said 2k for logic to be applied and then passed back down to the 2k and out the port the…
PacketWrangler
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9
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1 answer

How does NAT Stitching work?

While reading about CISCO NetFlow Analysis I came up with a term named NAT Stitching. I understand Flow Stitching which join same type of inbound and outbound connection. But can't find anything discrete about NAT Stitching except the following,…
arif
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9
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5 answers

Static redistribution into EIGRP as internal failure

I am redistributing a static route into EIGRP on a 6500. I had read here if you enter a network statement matching a static route that it would be redistributed as an internal route by EIGRP. However, after entering the configuration, neighbors…
henklu
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9
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2 answers

Is there anything stopping me from using Class A addresses on my own network?

I've been reading about IPv4, networking, subnetting and the different classes of addresses. I understand that IP addresses beginning with numbers from 1 to 126 are considered "Class A" addresses. However suppose I created a private network for my…
CodyBugstein
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9
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8 answers

Can Ethernet frames only be transmitted in a LAN?

In the LAN depicted in the picture below, am I correct in saying that devices do not have IP addresses? There is no router and also only Ethernet frames (with source and destination mac address would be transmitted) and not IP packets. Is that a…
TomTech
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3 answers

Does varying the angle of omni directional antennas affect connection quality between WiFi APs?

I use Cisco access points AIR-CAP1552E to connect buildings via WiFi, 802.11a/n (5 GHz). Normally, they are mounted upright, with three three omni directional antennas at the bottom. Now I consider a single AP on the roof of a very small building,…
Stefan
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9
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4 answers

Cisco-configuration syntax highlighting for TextMate/Sublime Text

I would like to have syntax highlighting while perusing my configs - does anybody know of a good Cisco IOS syntax highlighting bundle for TextMate or Sublime Text? Edited (2015-09-21) to add: GitHub Atom Editor has a Cisco IOS syntax highlighter in…
Jan
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4 answers

How would a firewall kill a TCP connection without RST or FIN?

Situation is like this: http client ----> corporate firewall ----> http server Due to a keepalive, server and client would keep TCP connections open and the client would use a connection pool for HTTP requests. The firewall has a rule to "kill"…
cen
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9
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4 answers

The maximum length of CAT6 for intranet network?

Recently I purchased CAT6 cable with a length of 150 meter. I bought another CAT6 with a length of 148 meter. I joined both the cables using RJ45 cable coupler. I tested it using LAN TESTER, and everything looks normal. One of the end of the cable…
Mawia HL
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9
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3 answers

Implementing Cisco QoS model to end users

I have implemented the 4-Class QoS Model as described in this earlier post from 2013. This Core configuration is implemented on a Cisco VSS 6509-E setup running software version: Cisco IOS Software, s2t54 Software (s2t54-ADVENTERPRISEK9-M), Version…
user36472
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