Dell SmartFabric OS10 User Guide Release 10.5.3

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Support for north-bound external interfaces

Use this feature to enable or disable Layer 2-host Wide mode or Narrow mode on a S5448F-ON or Z9432F-ON switch.

Configurations apply only to the layer on which they are first configured each time the switch re-boots.

Enable or disable configurations are persistently saved across numerous reloads.

You can configure the MAC address table or the Layer 2 host table using the following two modes:

Wide mode (extended mode)
Narrow mode (default mode)

The maximum Layer 2 hosts that you can configure varies between the two modes. In Narrow mode the maximum number of configurable Layer 2 hosts is twice that of the Wide mode.

Layer 2 forwarding based on traditional VLANs (with the VLAN-ID range from 1 to 4093) or virtual networks operating in EVPN mode, can function in both Wide and Narrow modes.

However, for Layer 2 forwarding on virtual networks operating in non-EVPN mode (for example, static VXLAN), you must explicitly configure Wide mode on the Layer 2 host table.

You must save the Layer 2 Wide and Narrow mode configuration. The saved configuration is reflected after the system reloads.

Restrictions and Limitations

North-bound external interface restrictions and limitations:

You must reboot the system to apply Wide mode configuration changes.
You cannot configure non-EVPN mode (Static VXLAN) in Narrow mode.
You cannot disable Wide mode when Static VXLAN is configured.

SFP56-DD port-groups

On the SFP56-DD port-groups, you can configure breakout modes such that the overall number of ports that can be assigned is limited to 32.

The following table lists the SFP56-DD port-group breakout modes:

Table 1. SFP56-DD port-group breakoutSFP56-DD port-group breakout
Port-groups	Port	Default profile	Restricted profile	Description
1/1/3-1/1/8	Odd port member	1x-? modes: 100g-1x, 50g-1x, 25g-1x, 10g-1x	1x-? and 2x-? modes: 100g-1x, 50g-1x, 25g-1x, 10g-1x, 50g-2x	2x-? breakout mode is available on the odd-numbered port members in a special breakout profile; where, the even-numbered port member is disabled.
1/1/3-1/1/8	Even port member	1x-? modes: 100g-1x, 50g-1x, 25g-1x, 10g-1x	Disabled

QSFP56-DD port-groups

On the QSFP56-DD port-groups, you can configure breakout modes such that the overall number of ports that can be assigned is 40.

Three different types of Restricted profiles exist for configuring breakout modes on the QSFP56-DD ports and SFP56-DD port members.

The following table lists the QFP56-DD port-group breakout modes:

Table 2. QSFP56-DD port-group breakoutQSFP56-DD port-group breakout
Port-groups	Port	Default profile	Restricted-QSFP-2x	Restricted-qsfp-8x	Restricted-SFP-2x	Description
1/1/1, 1/1/2, 1/1/19, and 1/1/20	QSFP DD Odd port member	1x-?, 2x-?, 4x-? modes: 400g-1x, 200g-2x, 200g-1x, 100g-4x,100g-1x, 100g-2x, 50g-2x, 40g-1x, 40g-2x, 25g-4x, 10g-4x	1x-?, 2x-?, modes: 400g-1x, 200g-2x, 200g-1x, 100g-1x, 100g-2x, 50g-2x, 40g-1x, 40g-2x	1x-? and 8x-? modes: 400g-1x, 200g-1x, 100g-1x, 50g-1x, 40g-1x, 100g-1x, 50g-8x, 25g-8x, 10g-8x	1x-? modes: 400g-1x, 200g-1x, 100g-1x, 50g-1x, 40g-1x, 100g-1x	The default profile allows you to configure the 4x-? and 2x-? breakout modes on the QSFP56-DD port members. The Restricted-QSFP-2x profile allows you to configure the QSFP56-DD port members in the 2x-? breakout mode. Simultaneously, this profile allows you to configure the SFP56-DD odd port members in the 50g-2x breakout mode. The Restricted-QSPF-8x profile allows you to configure the 8x-? breakout mode on the odd- numbered QSFP56-DD port members. The Restricted-SFP-2x profile allows you to configure the 2x-? breakout mode on all the SFP56-DD port members while utilizing the QSFP56-DD uplinks in 1x-? breakout mode. Switching the breakout profile initializes the port members in the default mode for the profiles such as 400g-1x for the QSFP56-DD ports and 100g-1x (or Disabled) for the SFP56-DD ports.
	QSFP DD Even port members	1x-?, 2x-?, modes: 400g-1x, 200g-2x, 200g-1x, 100g-1x,100g-2x, 100g-2x, 50g-2x, 40g-1x, 40g-2x	1x-?, 2x-?, modes: 400g-1x, 200g-2x, 200g-1x, 100g-1x, 100g-2x, 50g-2x, 40g-1x, 40g-2x	1x-?, 2x-?, modes: 400g-1x, 200g-2x, 200g-1x, 100g-1x, 100g-2x, 50g-2x, 40g-1x, 40g-2x	1x-? modes: 400g-1x, 200g-1x, 100g-1x, 50g-1x, 40g-1x, 100g-1x
	SFD DD Odd port members	1x-? mode: 100g-1x, 50g-1x, 25g-1x, 10g-1x	1x-? and 2x-? modes: 100g-1x, 50g-1x, 25g-1x, 10g-1x, 50g-2x	Disabled	1x-? and 2x-? modes: 100g-1x, 50g-1x, 25g-1x, 10g-1x, 50g-2x
	SFD DD Even port members	1x-? mode: 100g-1x, 50g-1x, 25g-1x, 10g-1x	1x-? mode: 100g-1x, 50g-1x, 25g-1x, 10g-1x	Disabled	1x-? and 2x-? modes: 100g-1x, 50g-1x, 25g-1x, 10g-1x, 50g-2x

Breakout configuration matrix

The following table captures the support matric corresponding to the breakout configurations:

Table 3. Breakout configuration matrixBreakout configuration matrix
Speed	Configuration	Yes or No	Description
100G	48x100G (PAM4) + 8x400G (PAM4)	Yes
	48x100G (PAM4) + 8x400G (PAM4)	Yes
	48x100G (PAM4) + 16x100G (NRZ)	Yes
50G	48x50G (PAM4) + 8x400G (PAM4)	Yes
	64x50G (PAM4) + 8x400G (PAM4)	Yes	You must configure the QSFP56-DD port-groups in Restricted-SFP-2x profile.
	72x50G (PAM4)	Yes
	56x50G (PAM4) + 16x100G(NRZ)	Yes	You must configure the QSFP56-DD port-groups in Restricted-QSFP-2x profile.
	64x50G (PAM4) + 8x100G(NRZ)	Yes
	48x50G (PAM4) + 16x100G (NRZ)	Yes
	48x50G (PAM4) + 8x100G(NRZ)	Yes
25G	48x25G (NRZ) + 8x400G (PAM4)	Yes
	64x25G (NRZ) + 8x400G (PAM4)	Yes
	72x25G (NRZ)	Yes
	48x25G (NRZ) + 16x100G(NRZ)	Yes
	48x25G (NRZ) + 8x100G (NRZ)	Yes
	56x25G (NRZ) + 16x100G(NRZ)	Yes
	64x25G (NRZ) + 8x100G(NRZ)	Yes
10G	48x10G (NRZ) + 8x400G (PAM4)	Yes
	64x10G (NRZ) + 8x400G (PAM4)	Yes
	48x10G(NRZ) + 8x100G (NRZ)	Yes
	72x10G (NRZ)	Yes
	48x10G (NRZ) + 8x40G (NRZ)	Yes
	48x10G (NRZ) + 16x40G (NRZ)	Yes