HI community, im having issues to understand why this QoS is behaving like this. router is 4331/k9   my understanding is since the main Policy(parent) is CBWFQ it assigned up 50% and 40% to the class in the main. then the remaining BW is assigned to the class class-default based on this reamining bw, it is how the class is calculated?    issues is: when the traffic CMV is running it always gets 50mbps no matter what.     all my email which is in COS 3 slows down really bad.. even when there is another 50Mbps available in the circuit...   how is BW really being calculated  for each parent class and class default ?    maybe ???\ total bw available 100mbps(95Mbps due to shaping) 50mbps to the CMV traffic class 50Mbps remaining to the class class-default   priority 30% of 50mbps = 15mbps  Real remaining BW 35mbps? 20% to my COS3    30mbps * 20% = 7mbps available for the COS3 class?   interface GigabitEthernet0/0/0 description link to PE bw 100Mbps service-policy output SHAPE output omitted   policy-map SHAPE class HOPOFF shape average percent 40 class CMV shape average percent 50 class class-default shape average percent 95 service-policy EGRESS_QUEUING     class COS1 priority percent 30 class COS2V bandwidth remaining percent 25 fair-queue police rate percent 25 conform-action set-dscp-transmit af41 exceed-action set-dscp-transmit af42 class COS2 bandwidth remaining percent 25 fair-queue random-detect dscp-based police rate percent 25 conform-action set-dscp-transmit af31 exceed-action set-dscp-transmit af32 class COS3 bandwidth remaining percent 25 fair-queue random-detect dscp-based police rate percent 25 conform-action set-dscp-transmit af21 exceed-action set-dscp-transmit af22 ... View more

Our network architect came up with this reply when i suggested to split the /20 shared vlan into smller subnets /23 each  Segmentation: Current client Vlan is /20 (up to 4000 clients). Anyhow, DHCP range is much smaller and with today's switches, client NICs and CPU's having Up to 1000 clients per subnet won't cause any performance issues. It used to be best practice, when we had 10mb Networks/hubs…etc, to not have bigger subnets than /24 In the mid-2000’s as TCP/IP took hold it became common to increase the Campus Subnets to /22 as the number of devices in the network increased and we were limited to 1024 VLAN IDs. Broadcasts had reduced significantly because the dominant protocol of Microsoft’s NetBIOS over TCP/IP had stopped using broadcasts for name resolution by default and switched to using Windows Internet Naming Service (WINS) . The logic was that 1000 or so hosts would a reasonable number for pure TCP/IP networks. Further are the site's following current global LAN standard, which is implemented in all ALA sites without any reported issues. If not required for security reason, we shouldn't spilt the subnet and keep management simple. I have  read few networks books and desgin guides from cisco, and they always reommed subnets. what do you experts think?  ... View more

Hi Guys, can someone confirm if Broadcast and multicast are ack over the air(CSMA), i read all packets that are sent due to the nature of shared media and avoidance collision, all packets with no exception has to be ack by the receiver, but this sounds true only for unicast where there is an specific receiver... no sure if apply to  broadcast or multicast just beause the packets are sent.... ... View more

Hi community    can anyone explaine what would be the behaviur of this config on both scenarios, congestion and no congetion i have a parent police shaping the circuit to 30 Mb policy-map EQ class COS 5  banwidwth remaining percent 4 fair-queu police-rate percent 4  conform-action set-dscp-transmit af11   *********config     policy-map SHAPE_90% class class-default   shape average percent 90    service-policy EGRESS_QUEUING     policy-map EGRESS_QUEUING class COS1   priority percent 5 class COS2V   bandwidth remaining percent 25   fair-queue   police rate percent 25    conform-action set-dscp-transmit af41    exceed-action set-dscp-transmit af42 class COS5   bandwidth remaining percent 4   fair-queue   police rate percent 4    conform-action set-dscp-transmit af11    exceed-action set-dscp-transmit af12   ... View more

Hi WIFI Experts i have a doubt about Mobility anchor here is a descrption if my topology central controller (anchor ) ssid Guest is in US Corp office and for branches i have 1 wlc per city,  branch-1. branch-2, each city has around 300 guest clients so a subnet /23 (512) is needed to support the clients. my question is if at  the anchor wlc (central) can i use ap groups to assign a different subnet to each branch office? if so, will the anchor controller attached to the management interface? ... View more

wlc 5508 code 7.0.220.0 AIR-CAP3502E-N-K9 ap mode: hreap vlan mapping native 30 vlan ssid  x 310. each time that for what ever reason my access point goes down(not that my access point resets by itself, if i have to move it), the setting in the vlan mapping  resets to  whatever my native vlan is, in this case 30 that is native vlan 30 ssid x vlan 30 any idea. ... View more

Hi today my wlc 5508 crash. after trying to get access via sp. i doesnt reponds. so i rebooted. in the sh tech i saw this message which i gues indicates the RC of the failure.    ANY IDEAS... ************************************************************ *             Start Cisco Crash Handler Serv               * ************************************************************ Sys Name:       usa-5354-wlc-02 Model:          AIR-CT5508-K9 Version:        7.0.98.0 Timestamp:      Thu Jan  5 05:43:13 2012 SystemUpTime:   254 days 4 hrs 46 mins 24 secs pid:            1225 TID:            944042816 Task Name:      locpRxServerTask Reason:         Reaper Reset timer tcb:      0x2572 timer cb:       0x10354e28 ('rrmTimerInit+600') timer arg1:     0x19b11010 timer arg2:     0x0 Long time taken timer call back inforamtion: --More-- or (q)uit Time Stamp:     Thu Sep 22 15:56:24 2011 timer cb:       0x100d6f48 ('apfRldpScheduleSet+656') Duration  : 103753 usecs, cbCount= 15 ------------------------------------------------------------ Analysis of Failure:   Software was stopped by the reaper for the following reason:      Reaper Reset: Task "locpRxServerTask" missed software watchdog ... View more