Hi, I want to configure MQC and bind the policy map to a interface configured as trunk. A few vlan's are configured.  2 of them are used as transit vlan for routing and carries the bulk of the traffic I want to shape. I was wondering how I should "capture" them in a class-map. Can it be done via a ACL based on source IP (thought this one might be unsuccessful since it’s a layer 2 interface), match vlan statement or both? Couldn’t find the answer elsewhere. Hope someone can help me out. Thanks, Erik ... View more

Hello all, I've got a problem of which I hope someone can help me. In our datacenter we've implemented HSRP on 2 6500's for redundancy purposes. Both switches are connected via a trunk. When an interface is administratively brought up, HSRP becomes instable. Below some selective logging:  12:58:01.759 CET: %HSRP-5-STATECHANGE: Vlan32 Grp 32 state Standby -> Active 12:58:01.919 CET: %HSRP-5-STATECHANGE: Vlan21 Grp 21 state Standby -> Active 12:58:02.031 CET: %HSRP-5-STATECHANGE: Vlan42 Grp 42 state Standby -> Active 12:58:02.031 CET: %HSRP-5-STATECHANGE: Vlan18 Grp 18 state Standby -> Active 12:58:02.223 CET: %HSRP-5-STATECHANGE: Vlan4 Grp 4 state Standby -> Active 12:58:04.331 CET: %HSRP-5-STATECHANGE: Vlan32 Grp 32 state Active -> Speak 12:58:04.667 CET: %HSRP-5-STATECHANGE: Vlan4 Grp 4 state Active -> Speak 12:58:04.847 CET: %HSRP-5-STATECHANGE: Vlan18 Grp 18 state Active -> Speak 12:58:05.367 CET: %HSRP-5-STATECHANGE: Vlan21 Grp 21 state Active -> Speak 12:58:07.767 CET: %HSRP-5-STATECHANGE: Vlan42 Grp 42 state Active -> Speak 12:58:14.855 CET: %HSRP-5-STATECHANGE: Vlan4 Grp 4 state Speak -> Standby 12:58:15.415 CET: %HSRP-5-STATECHANGE: Vlan21 Grp 21 state Speak -> Standby 12:58:15.479 CET: %HSRP-5-STATECHANGE: Vlan32 Grp 32 state Speak -> Standby 12:58:16.599 CET: %HSRP-5-STATECHANGE: Vlan18 Grp 18 state Speak -> Standby 12:58:18.536 CET: %HSRP-5-STATECHANGE: Vlan42 Grp 42 state Speak -> Standby                   Basically what happens, is that both switches becomes active and thus are forwarding traffic. After a few seconds all is back to normal. It seems they are missing each others "hello messages", so the state change is in this case normal outcome. What I can't figure out', is the root cause. Since it is triggered by bringing up an random interface configured as a dot1q trunk, I'm thinking of STP limits. But the limitations I found are 10.000 active STP logical ports and 1800 virtual ports per slot. In my case this is 2591 logical ports and all the virtual ports per slot are below 1800. This suggest the switch is capable of running this set-up without a problem. Some extra information: -Sup 720 10GE -Version 12.2(33)SXH2a -No Vss used -No drops on trunked interfaces between the 2 core switches -83 standby groups (max256) -R-PVST I hope someone has some useful tips. Thanks in advance!  ... View more

Hi All, I'm configuring EoMPLS in our LAN and ran into the mtu size. Best practice says to change the mtu size to 1504 (end tot end) due to the MPLS label. The physical link is a trunk and routing is done by OSPF trough a transit vlan. Should I change the mtu size of the svi to 1504 as well or should that be a different size? Some examples showed a mtu size of 1538, which confused me even more. Don't know how to calculate that number. Maybe frame overhead plus payload (whithout tagging). The platform is 6500 based. I hope someone can help me sorting this out. Thanks in advance. Erik                  ... View more

Hi All, I want to deploy QoS in a campus network for future VoIP. I red a lot about it, but I can't figure out a few things. The questions are about a cisco catalyst 6500, which is the core of the campus. -Is it the best practice to use "auto qos voip trust" on trusted uplink interfaces? I know there is a macro behind, which changes some bandwith ratios, tresholds etc for all interfaces on the same ASIC and adjusts the global cos-dscp mapping. But I can't find any recommendation. There must be a good reason for it, but why are these settings not default and active when you globally enable mls qos? -Is priority scheduling enabled when there is no bandwith ratio filled in for queue 4 (1p3q8t)? -If "mls qos trust cos" is configured on a trunked interface which transport l3 transit vlans with a dscp value set, would it use the dscp-cos mapping and leave the according cos value untouched? Thanks in advance.. Greetings, Erik ... View more

Hi, It might be a simple question but I couldn't find it. Is it possible to adjust the In-Use Connection Timeout for a particular domain (via CLI) and not global as this is the only option I found? We experiencing timeout issues for a particular domain when downloading files and I don't want the configuration change affects the global configuration. Thanks in advance! Greetings, Erik ... View more