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1500 questions
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2 answers

QoS Video - I want to prioritise video traffic. What protocols and port numbers should I add to my QoS design?

Can someone please tell me what protocols and port numbers I need to add to my Prec 5 DSCP QoS configurations to ensure that any video traffic gets pushed out first if there is congestion. Is it just RTP and H.323 protocols? Thanks :)
NetworkNinja
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Access Multiple VLANs from One Computer

I inherited a bit of mess and am preparing to redo our IP addressing scheme and also split our network into multiple VLANs. Possibly something like: 10.1.10.0/24 VLAN 10 VOIP 10.1.20.0/24 VLAN 20 Users 10.1.30.0/24 VLAN 30 Management The address…
netnewb
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Why each and every single port on Layer 2 switches need to have it's own MAC address?

A switch doesn't alter the frame, and source/destination mac addresses remain how sending host specified them,so let me say it again Layer 2 Switching never changes the frames means no changes in MAC and in CRC values,switches either flood, forward,…
user7741
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Troubleshooting One Way Audio

Quick question for the VoIP gurus. A while back I learned a trick where if I received a call on a VoIP phone, but after answering I couldn't hear anything, I would ask the person to press a number on their keypad if they could hear me. If I heard…
Mike
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1 answer

SFP+ complains threshold violation and went down

All, Recently bought 3 Cisco switches: 3560x and two 2960Xs. 3560 acting as the core switch and other 2 switches are connected using SFP+ (One SFP-H10GB-CU1M and other SFP-10G-SR) I have issue with the SFP-10G-SR. I connected the SFP-10G-SRs with…
Firdous Amir
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2 answers

RSTP Basics: Can this be done?

What I've got: Two 24 port switches in building A, with 2 fibre trunks from building A to building B - where there are two 48 port switches. The two 24 port switches support RSTP and STP. HP 1810-24G v2. The two 48 port switches do not. HP 1810-48G…
Sam
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3 answers

Regarding Dot1X dynamic VLAN assignment

Situation: I am trying to get 802.1X working for me. I want RADIUS server to dynamically assign VLANs to ports based on RADIUS reply attribute for particular user. I have an HP E2620 switch and a FreeRADIUS server. The supplicant is a Windows 8.1…
Alex
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1 answer

UDP hole punching NAT port

I just read an article about the process of "punching holes" with the UDP protocol. I understand how it's done, but I have one last question to clear up things. We have the rendezvous server and client A,B. Client A punched a hole already for client…
Tagaeyan Tagan
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Problem with VPN tunel from remote location through ISP (PPTP)

I have network situation like this: ISP Router (modem) - device given to us by our ISP - modem & router in one but it is set into transparent mode - ISP say so ;D we have to find it that it is true :) MikroTik Router (MTR) - our edge router with…
DDos Schwagins
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Raw API data for Cisco Meraki CMX Dashboard

Has anyone worked with Meraki's CMX raw data feed and can help answer some questions? I came here to ask because I have found no conversations about Meraki's CMX API elsewhere and I imagined that network engineers are still more likely to know about…
Dengar
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3 answers

Does a mirror port keep VLAN tags?

I have the following config on a Brocade XMR, running IronWare 5.6.0c. Will the traffic mirrored to e 1/13 keep it's VLAN tags, so I can distinguish where it came from? Or will the tags be stripped and all be untagged? And for bonus points, if it…
zevlag
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1 answer

Sarbanes Oxley for Network Engineers / Architects

Our organization has recently restructured IT and has separated network engineers into new roles such as architect, implementation engineer, and operational support engineer. There are concerns surrounding SOX compliance and how / whether we would…
Silv
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Devices behind Catalyst 2960 not receiving DHCP addresses

I am having an issue with DHCP not traversing to devices behind a switch. I have many other switches deployed with nearly the same configuration that are able to receive a DHCP address. On this switch that I am having issues with, most of the…
PenguinCoder
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# of bgp routes sent to neighbor drops after session reset

I have iBGP configured between two devices. After the bgp session comes up, the # of routes sent to RouterA from RouterB initially increases to roughly 100k, but then for some reason, it drops down to only 160. Is there a reason why this would be…
Network Samurai
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Is a DSP required with a SIP trunk?

Assuming a Cisco 3825 router, if the Cisco SCCP phones on the network are using G.711 µ-law and are traversing a CUCME system connected to a SIP trunk that supports G.711 µ-law, is a PVDM2 DSP card required since the codecs are the same? Does having…
WaxTrax
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