From: Alex Rodriguez (bsivasub@gmail.com)
Date: Mon Mar 06 2006 - 23:46:01 GMT-3
You don't have no such thing on high end platforms (4k, 6k) but you are
correct for 3550 and possibly all 3xxx.
- Balaji
On 3/6/06, Brian Dennis <bdennis@internetworkexpert.com> wrote:
>
> Are you sure that the maximum number of entries is not user
> configurable?
>
> Below shows the maximum number of unicast mac addresses being changed on
> a 3550.
>
> Rack1SW1#sho mac address-table count
>
> Mac Entries for Vlan 17:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Mac Entries for Vlan 22:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Mac Entries for Vlan 1:
> ---------------------------
> Dynamic Address Count : 2
> Static Address Count : 0
> Total Mac Addresses : 2
>
> Mac Entries for Vlan 5:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Mac Entries for Vlan 12:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Mac Entries for Vlan 34:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Mac Entries for Vlan 36:
> ---------------------------
> Dynamic Address Count : 1
> Static Address Count : 0
> Total Mac Addresses : 1
>
> Mac Entries for Vlan 473:
> ---------------------------
> Dynamic Address Count : 1
> Static Address Count : 0
> Total Mac Addresses : 1
>
> Total Mac Address Space Available: 5084
>
> Rack1SW1#conf t
> Enter configuration commands, one per line. End with CNTL/Z.
> Rack1SW1(config)#sdm prefer ?
> access multicast and qos/acl bias, drop unicast
> extended-match Using extended match for unicast routing
> routing unicast bias, drop qos/acl
> vlan vlan bias, drop routing
> <cr>
>
> Rack1SW1(config)#sdm prefer vlan
> Changes to the running SDM preferences have been stored, but cannot take
> effect
> until the next reload.
> Use 'show sdm prefer' to see what SDM preference is currently active.
>
> NOTE: Use caution with 'sdm prefer vlan', as any current Layer3
> configuration data
> will not be saved after a reload.
> Rack1SW1(config)#^Z
> Rack1SW1#reload
> 00:04:53: %SYS-5-RELOAD: Reload requested by console. Reload Reason:
> Reload Command.
>
> After Reload:
>
> Rack1SW1#sho mac-address-table count
>
> Mac Entries for Vlan 17:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Mac Entries for Vlan 22:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Mac Entries for Vlan 1:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Mac Entries for Vlan 5:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Mac Entries for Vlan 12:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Mac Entries for Vlan 34:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Mac Entries for Vlan 36:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Mac Entries for Vlan 473:
> ---------------------------
> Dynamic Address Count : 0
> Static Address Count : 0
> Total Mac Addresses : 0
>
> Total Mac Address Space Available: 8192
>
> Rack1SW1#
> Rack1SW1#sho sdm prefer
> The current template is the vlan template.
> The selected template optimizes the resources in
> the switch to support this level of features for
> 8 routed interfaces and 1K VLANs.
>
> number of unicast mac addresses: 8K
> number of igmp groups: 1K
> number of qos aces: 1K
> number of security aces: 1K
> number of unicast routes: 0
> number of multicast routes: 0
>
> Rack1SW1#
>
>
> From CCO:
>
> Optimizing System Resources for User-Selected Features
>
> By using Switch Database Management (SDM) templates, you can configure
> memory resources in the switch to optimize support for specific
> features, depending on how the switch is used in your network. You can
> select one of four templates to specify how system resources are
> allocated. You can then approximate the maximum number of unicast MAC
> addresses, Internet Group Management Protocol (IGMP) groups, quality of
> service (QoS) access control entries (ACEs), security ACEs, unicast
> routes, multicast routes, subnet VLANs (routed interfaces), and Layer 2
> VLANs that can be configured on the switch.
>
> http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12225sec/3550s
> cg/swadmin.htm#wp1235565
>
>
> HTH,
>
> Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> bdennis@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987
> Direct: 775-745-6404 (Outside the US and Canada)
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Alex Rodriguez
> Sent: Monday, March 06, 2006 5:47 PM
> To: Tim
> Cc: ccielab@groupstudy.com
> Subject: Re: show <max # of entries possible in CAM>
>
> show mac-address-table count
>
> It is hw specific and not based on how much DRAM u have.
>
> It is not user changable
>
> HTH
> Balaji
>
>
> On 3/6/06, Tim <ccie2be@nyc.rr.com> wrote:
> >
> > Hi guys,
> >
> >
> >
> > Is there a show command that will show the maximum # of entries
> possible
> > in
> > a CAM table that works for all (or most) cat switches?
> >
> >
> >
> > Does the size of the CAM depend on how much RAM there is in the
> switch?
> >
> >
> >
> > And, finally, is this size fixed or user settable? If settable, what
> > command can be used to set the CAM size?
> >
> >
> >
> > TIA, Tim
> >
> >
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