2960 SDM Templates Multicast support

[HUBERT RESCH]

Hi when changing SDM-template to lanbase-routing it shows the new values.

switch#sh sdm prefer
The current template is "default" template.
The selected template optimizes the resources in
the switch to support this level of features for
0 routed interfaces and 255 VLANs.

  number of unicast mac addresses:                  8K
  number of IPv4 IGMP groups:                       0.25K
  number of IPv4/MAC qos aces:                      0.125k
  number of IPv4/MAC security aces:                 0.375k

switch#

switch#sh sdm prefer

The current template is "lanbase-routing" template.

The selected template optimizes the resources in

the switch to support this level of features for

8 routed interfaces and 255 VLANs.

  number of unicast mac addresses:                  4K

  number of IPv4 IGMP groups + multicast routes:    0.25K

  number of IPv4 unicast routes:                    4.25K

    number of directly-connected IPv4 hosts:        4K

    number of indirect IPv4 routes:                 0.25K

  number of IPv4 policy based routing aces:         0

  number of IPv4/MAC qos aces:                      0.125k

  number of IPv4/MAC security aces:                 0.375k

switch#

I am a little bit confused with default SDM we can see number of IPv4 IGMP groups what is ok for me, because

2960 is able to do IGMP-snooping

With the lanbase-routing SDM number of IPv4 IGMP groups + multicast routes appears.

Does this mean that MC-routing in possible with 2960 ??

Thx

Hubert

[Peter Paluch]

Hello Hubert,

Currently, the multicast routing is certainly not possible with 2960 Catalyst switches. I doubt that there will be a multicast routing support for these switches added in the future because that would require implementing the PIM protocol which is, considering the lack of support of unicast routing protocols on the 2960 platform, improbable.

I personally believe that the show sdm prefer output is actually a universal output retaken from 3550/3560 IOS code. This is an output from a 3560 Catalyst switch running 12.2(46)SE:

Switch#show sdm prefer
The current template is "desktop IPv4 and IPv6 default" template.
The selected template optimizes the resources in
the switch to support this level of features for
8 routed interfaces and 1024 VLANs.

  number of unicast mac addresses:                  2K
  number of IPv4 IGMP groups + multicast routes:    1K
  number of IPv4 unicast routes:                    3K
    number of directly-connected IPv4 hosts:        2K
    number of indirect IPv4 routes:                 1K
  number of IPv6 multicast groups:                  1.125k
  number of directly-connected IPv6 addresses:      2K
  number of indirect IPv6 unicast routes:           1K
  number of IPv4 policy based routing aces:         0
  number of IPv4/MAC qos aces:                      0.5K
  number of IPv4/MAC security aces:                 1K
  number of IPv6 policy based routing aces:         0
  number of IPv6 qos aces:                          0.5K
  number of IPv6 security aces:                     0.5K

As you can see, the IGMP groups + multicast routes line is identical here. On 2960, it is IMHO misleading because there is no multicast routing support, just the IOS code is obviously retaken and reused.

Best regards,

Peter