topic Re: ICX 7250 and family: Support "Broadcom 2.5G" on SFP+ ports in ICX Switches

ICX 7250 and family: Support "Broadcom 2.5G" on SFP+ ports

adam_jaremko — Wed, 06 Nov 2019 04:58:50 GMT

I like to request the enablement of "Broadcom 2.5G" and NOT to be confused with MultiGig via Aquantia or the likes.

Obviously, this is a niche request to support the very few SFP modules that sync at such speeds, but they do exist in the market, such as: https://www.sourcephotonics.com/product/sps-34-24t-hp-tdfo/ or any powered by an Intel® FALCTM ONT GPONSFP PEF98035 Chipset PEF98035ETV13 S LLC5.

Such modules do work when the interface is configured with: speed-duplex 1000-full as auto configuration fails but are not running at their default data throughput of 2.5Gbps.

As you're aware the ICX 7250 8 SFP+ ports are divided by 2 WarpCore's, 4 SerDes pairs per core, and us mere end users can observe as much by running the simple command: phy 1/2/1.

And from my past encounters with the WarpCore, it's feasible to run native SerDes 8b/10b 3.125Gbps to achieve a data throughput of 2.5Gbps and most definitely so when the right bits are set, eg.

https://community.broadcom.com/communities/community-home/digestviewer/viewthread?MID=698164

https://www.dslreports.com/forum/r32230041-Internet-Bypassing-the-HH3K-up-to-2-5Gbps-using-a-BCM57810S-NIC

https://www.dslreports.com/forum/r32393899-Internet-Bypassing-the-HH3K-up-to-2-5Gbps-using-a-BCM57711-NIC

Hopefully this request doesn't fall on deaf ears and speed-duplex 2500-full works in a future firmware release.

Thanks.

Re: ICX 7250 and family: Support "Broadcom 2.5G" on SFP+ ports

simon_pollard — Wed, 06 Nov 2019 09:11:16 GMT

Hi

Thanks for the suggestion. Could you advise what the use case would be for a 2.5G SFP port? The primary use case for 2.5G is WiFi-6 Access Points which require PoE which won't be possible with an optic.

The optic that you referenced is asymmetric 1.5G TX/2.5G RX and outside of PON applications so could not be used in ethernet applications such as on the 7250.

Re: ICX 7250 and family: Support "Broadcom 2.5G" on SFP+ ports

adam_jaremko — Wed, 06 Nov 2019 18:05:50 GMT

The primary use case would be FTTP/FTTH/FTTB installs for small business, home business, home lab, etc. to reduce hardware and the associated maintenance and utility costs.

The modules are not much different from an Access Point. They're more than just a conduit like typical optics since they have an embedded SoC with OS and ethernet layer for triple play VLANS, but at the same time are limited, which is where an L3 switch can expand on. In the case of the linked module, it's running OpenWRT linux and provides all the conveniences. The capacity is tied end to end.

This is how the LAN/SFP end of the module can be configured.

Long Form: lan_port_cfg_get
Short Form: lanpcg
Input Parameter
- uint32_t pport
Output Parameter
- enum onu_errorcode errorcode
- uint32_t pport
- uint32_t enable
- int32_t mdio_dev_addr
- enum lan_mode_gmux gmux_mode
   LAN_MODE_GMUX_GPHY0_GMII = 0
   LAN_MODE_GMUX_GPHY0_MII2 = 1
   LAN_MODE_GMUX_GPHY1_GMII = 2
   LAN_MODE_GMUX_GPHY1_MII2 = 3
   LAN_MODE_GMUX_SGMII = 4
   LAN_MODE_GMUX_XMII0 = 5
   LAN_MODE_GMUX_XMII1 = 6
- enum lan_mode_interface mode
   LAN_MODE_OFF = 0
   LAN_MODE_GPHY = 1
   LAN_MODE_EPHY = 2
   LAN_MODE_SGMII = 3
   LAN_MODE_SGMII_FAST = 4
   LAN_MODE_RGMII_MAC = 5
   LAN_MODE_RMII_MAC = 6
   LAN_MODE_RMII_PHY = 7
   LAN_MODE_GMII_MAC = 8
   LAN_MODE_GMII_PHY = 9
   LAN_MODE_MII_MAC = 10
   LAN_MODE_MII_PHY = 11
   LAN_MODE_TMII_MAC = 12
   LAN_MODE_TMII_PHY = 13
   LAN_MODE_TBI_SERDES = 14
   LAN_MODE_TBI_AUTODETECT = 15
- enum lan_mode_duplex duplex_mode
   LAN_PHY_MODE_DUPLEX_AUTO = 0
   LAN_PHY_MODE_DUPLEX_FULL = 1
   LAN_PHY_MODE_DUPLEX_HALF = 2
   LAN_PHY_MODE_DUPLEX_UNKNOWN = 3
- enum lan_mode_flow_control flow_control_mode
   LAN_FLOW_CONTROL_MODE_AUTO = 0
   LAN_FLOW_CONTROL_MODE_RX = 1
   LAN_FLOW_CONTROL_MODE_TX = 2
   LAN_FLOW_CONTROL_MODE_RXTX = 3
   LAN_FLOW_CONTROL_MODE_NONE = 4
- enum lan_mode_speed speed_mode
   LAN_MODE_SPEED_AUTO = 0
   LAN_MODE_SPEED_10 = 1
   LAN_MODE_SPEED_100 = 2
   LAN_MODE_SPEED_200 = 3
   LAN_MODE_SPEED_1000 = 4
   LAN_MODE_SPEED_2500 = 5
   LAN_MODE_SPEED_UNKNOWN = 6
- uint8_t tx_clk_dly
- uint8_t rx_clk_dly
- uint16_t max_frame_size
- uint32_t lpi_enable
- enum sgmii_autoneg_mode autoneg_mode
   SGMII_NO_ANEG = 0
   SGMII_MAC_ANEG = 1
   SGMII_PHY_ANEG = 2
   SGMII_SERDES_ANEG = 3
- uint32_t invtx
- uint32_t invrx

and the result of SSH into the module and running: onu lan_port_cfg_get 0

errorcode=0 pport=0 enable=1 mdio_dev_addr=-1 gmux_mode=4 mode=15 duplex_mode=1 flow_control_mode=4 speed_mode=5 tx_clk_dly=0 rx_clk_dly=0 max_frame_size=9216 lpi_enable=1 autoneg_mode=3 invtx=0 invrx=0

As you can see the LAN/SFP end is set to Ten-bit Interface AUTO, speed is set to 2500, duplex is set to full, etc.

Ideally, if you were to SSH and run: onu lan_port_status_get 0, you'd like to see the following result

errorcode=0 pport=0 mode=15 enable=1 link_status=5 phy_duplex=1

rather than

errorcode=0 pport=0 mode=15 enable=1 link_status=4 phy_duplex=1

The 1st is achieved using a BCM57810S Adapter with a 2.5G driver patch (It uses a WarpCore as well) and the 2nd is from an ICX 7250. Where link_status is

- enum lan_phy_status link_status
   LAN_PHY_STATUS_OFF = 0
   LAN_PHY_STATUS_DOWN = 1
   LAN_PHY_STATUS_10_UP = 2
   LAN_PHY_STATUS_100_UP = 3
   LAN_PHY_STATUS_1000_UP = 4
   LAN_PHY_STATUS_2500_UP = 5
   LAN_PHY_STATUS_NONE = 6
LAN_PHY_STATUS_UNKNOWN = 255

Re: ICX 7250 and family: Support "Broadcom 2.5G" on SFP+ ports

simon_pollard — Thu, 07 Nov 2019 14:34:13 GMT

FTTx/PON is not a target market for the 7250, or Ruckus more broadly, so this is not a solution that we would pursue.

Thanks for the suggestion, let us know if you have any other ideas.

Re: ICX 7250 and family: Support "Broadcom 2.5G" on SFP+ ports

adam_jaremko — Fri, 08 Nov 2019 19:59:24 GMT

That's understandable.

Thanks for the consideration and time.

Re: ICX 7250 and family: Support "Broadcom 2.5G" on SFP+ ports

yani_ioannou — Tue, 19 Nov 2019 06:27:04 GMT

A more motivating factor for enabling this feature is the availability of 2.5Gbit and 5Gbit NBase-T SFP+ modules.

This is exactly why Ubiquity has enabled this feature in both of its 10Gbit switches, after a similar request, and has actually got quite a bit of a following due to being one of the few switches to support this feature at the moment:

https://community.ui.com/questions/ES-16-XG-and-Aquantia-AQS-107-802-3bz-NBase-T-SFP-Multi-gigabit-Transceiver/d13b08a1-3af1-4470-93f2-7bdeff907b69

Re: ICX 7250 and family: Support "Broadcom 2.5G" on SFP+ ports

simon_pollard — Tue, 19 Nov 2019 08:36:27 GMT

Multigig has moved on and we now have dedicated switches for this, if you are looking at the 7250 then the best option is out ICX7150-48ZP which has 16x2.5G ports in addition to 32x1G and 8xSFP/SFP+. All copper ports have PoE+ power. If you need full 2.5/5G multigig then the 7650 range or the ICX7150-C10ZP switch would be most suitable.

SFP+ ports with a 10GBase-T transceiver don't make much sense for APs as there is no PoE power for the APs.

Re: ICX 7250 and family: Support "Broadcom 2.5G" on SFP+ ports

Rnerd — Sun, 05 Jun 2022 02:18:52 GMT

Hello, I was surprised to hear that FTTx/PON market is not targeted by Ruckus. There is the whole concept of “Lennar Homes” that is in collaboration with Ruckus to provide networking to homes with high speed fiber internet.

I was hoping this can be reconsidered for ICX switches. If 2500Basex can be unlocked on SFP+ ports through just a software update, this would certainly be great. I own a 7150-C12P.

Hope to hear back soon!

Re: ICX 7250 and family: Support "Broadcom 2.5G" on SFP+ ports

jbuonagurio — Fri, 20 Sep 2024 08:46:34 GMT

I just wanted to add to this request for 2500BASE-X (2.5GBASE-X) support on the 7150-C12P if possible, or any other ICX switch. This is not just for FTTx/PON! The brand new Microchip PDS-204GCO outdoor PoE switch and other switches based on the Microchip VSC7514 use 2.5G SFP modules for uplink.

The 7150-C12P is based on the Broadcom Hurricane3 ASIC (BCM56160) which has 8 x SGMII / 2500BASE-X PHYs. If the 2 x 10G SFP+ ports are connected there (they are at the same PHY address, 0xa1), I assume 2.5G could be supported natively.

If I could buy some ICX switches that support this already I'd be more than happy to do that, but I don't know that the 7150-C10ZP supports 2.5G SFP modules either? The datasheet only mentions multigig support on copper; uplink ports are still 2 x 10G SFP+.

Re: ICX 7250 and family: Support "Broadcom 2.5G" on SFP+ ports

jbuonagurio — Fri, 20 Sep 2024 08:37:57 GMT

SFP+ ports with a 2.5GBase-X transceiver make sense as aggregation links to remote switches that supply PoE power to APs or cameras. It's 2024 (sorry to raise this post from the dead) and Microchip is making brand new outdoor switches with 2.5G SFP. Why not 10G SFP+? I don't know, thermal considerations maybe. Regardless it's very hard to find switches which support these modules, or if they do it's generally undocumented.