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I have internet problem, when no ip proxy-arp

6500 is core switch, have 2 vlanvlan 101 (server)ip add 172.16.1.254/24vlan  22 (client)ip add 172.16.22.254/24interface Vlan101ip address 172.16.1.254 255.255.255.0ip helper-address 172.16.1.102no ip proxy-arp!interface Vlan22ip address 172.16.22.25...

wisit_jan by • Level 1
  • 1850 Views
  • 4 replies
  • 0 Helpful votes

Bridging Loop on VLAN 1?

hello - can control plane traffic cause a stormImagine a looped triangle topology with VLAN 1 passing all the control plane traffic over the interconnecting dot1q trunks as usual. Lets say STP does NOT successfully converge on VLAN 1 for whatever rea...

visitor68 by • Level 4
  • 1315 Views
  • 5 replies
  • 0 Helpful votes

NAT PBR HSRP and 'connection rejected'

Hi there.Doing a lab to play with a combination of features.Having trouble with connections between 2 VLANs.I am doing NAT, Policy Based Routing (PBR) and HSRP on two routers.The routers are cisco 1921 running (C1900-UNIVERSALK9-M), Version 15.3(2)TF...

Resolved! VS-SUP2T Class-map preconfigured

                   Hello All,i have new chassis with VS-sup2t i found class-map preconfigured can explain why these configured and do i have to delete ?class-map match-any class-copp-icmp-redirect-unreachableclass-map match-all class-copp-gleanclass-...

Steev112 by • Level 1
  • 963 Views
  • 1 replies
  • 0 Helpful votes

Resolved! Power Calculator for POE

Does anyone know why there is a disparity between the power consumption for PoE calculatorand spec sheet ? What is being factor in the calculator?WS-C3750X-48P-S(715W) : spec sheet say default PoE power of 370 WBut the calculator has it as Total PoE ...

xayavongp by • Level 1
  • 3117 Views
  • 2 replies
  • 0 Helpful votes

Resolved! Advice on ACL, VACL or Static Routing

Hi all,I'm looking to create a new DMZ VLAN that is only accessible via our firewall, but I'm thinking of a few different ways to stop inter VLAN routing to this VLAN and was wondering what the best way of doing it would be?The network simplistically...

QoS for RT Video

Most of the reference material I have seen on cisco.com has RT video being marked DSCP 34 and mapped to a CBWFQ.However, part of the Enterprise MediaNet QoS Design document refers to TelePresence traffic being in the strict priority queue which shoul...

gmckay2e2 by • Level 1
  • 442 Views
  • 1 replies
  • 0 Helpful votes

Resolved! Layer 3 Switch as VTP Server

I always hear that you cannot have a router act as a VTP server to propagate all your VLAN settings out to your switches. I have a Cisco 3550 Switch which is doing inter vlan routing. Can I set this to be in VTP server mode? Its a switch, yet its doi...

ZaneZ by • Level 1
  • 2025 Views
  • 4 replies
  • 0 Helpful votes

To upgrade the 3750 IOS or not to

Hey everyone, I am running a stack of 3750s (8) at the data center core. It's been up and running for over 2 years with no major issues so far (did I just jinx myself?). Issue is, they are all running the Version 12.2(55)SE1 of the IOS. Is there any ...

Ricky S by • Level 3
  • 727 Views
  • 8 replies
  • 0 Helpful votes
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