Intel Ethernet Controller I225-LM Support?

whizatit · Jan 18, 2021, 2:48 PM

Two cards I'm looking at...
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2 port version is... https://www.allqnap.com/index.php?route=product/product&product_id=28281&gclid=CjwKCAiAgJWABhArEiwAmNVTB7PnGofu7BTCmRO5j3recCN9OnpL6-GAmNd3yA2kmp4eecHH0nOnIRoClO8QAvD_BwE
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4 port version... https://www.allqnap.com/index.php?route=product/product&product_id=28282&gclid=CjwKCAiAgJWABhArEiwAmNVTB8jVSuNu9mr57vS8YDCNJ2ikH-gqtjO_s2OaRqj_g6mk9pBMZefjwhoC2_kQAvD_BwE

Both have the same Intel I225-LM controller.

Is there support for 2.5 Gbe in the current release for these cards?

THANK YOU!

whizatit · Jan 18, 2021, 2:57 PM

OR whats a good Intel 2-4 port 2.5Gbe card that it plug and pray supported?

whizatit · Jan 18, 2021, 3:00 PM

Oh yes almost forgot!! Current stable release as of this post installed and currently running a 1000 Gb connection, looking to upgrade.

bobbenheim · Jan 18, 2021, 3:01 PM

@whizatit you might need to look into the 500 or 700 series, Intel skipped FreeBSD support on the 225 series.

whizatit · Jan 18, 2021, 3:31 PM

@bobbenheim https://www.sybausa.com/index.php?route=product/product&path=64_144_157&product_id=1064

Look good? hard time finding cards within that model with 2-4 ports.

stephenw10 · Jan 18, 2021, 8:35 PM

@whizatit said in Intel Ethernet Controller I225-LM Support?:

currently running a 1000 Gb connection

You're gonna need a big CPU!

There is no i225 support in current pfSense. But there will be at some point.

Steve

whizatit · Jan 18, 2021, 9:03 PM

@stephenw10 Which intel cards that support 2.5 can be used?

PLENTY of RAM and Intel Core i7-9700K 3.6 GHz 8-Core Processor . No issue there!

bobbenheim · Jan 18, 2021, 9:43 PM

@whizatit got onboard 550 series on my current setup working perfectly at Gbit, got no idea if it will link up and work at 2.5 Gbit though.

stephenw10 · Jan 18, 2021, 10:21 PM

Sorry, I was being facetious. (1000Gb = 1Tbps!)

I have not personally rested anything at 2.5Gb or 5Gb but there other reports here on the forum of Intel base-T cards supporting that currently.
https://forum.netgate.com/post/955570

I don't believe there are any that support fibre at those speeds currently. If you need that your options are the Broadcom card with hacked firmware or some Realtek cards.

Steve

whizatit · Jan 18, 2021, 10:31 PM

@stephenw10 Im looking for an Intel multi gig card that will support 2.5 Gbps as i currently have 1.5 Gbps internet and the LAN out is 2.5 Gbps along with my 2.5 Gbps switches etc.

My bottleneck is the 1Gbps Intel pro card in the PfSense box atm.

stephenw10 · Jan 18, 2021, 10:37 PM

Right, it looks like the NIC linked there supports that: X710T2LBLK

I've never tested that myself though.

Steve

whizatit · Jan 18, 2021, 10:50 PM

@stephenw10 Roger that!

Dave 1 · Jan 26, 2021, 7:22 AM

@whizatit Netgate has added Intel i225-lm support: https://github.com/pfsense/FreeBSD-src/commit/402cb8c4ab502887dc8b8651646890b8e047dd17

Just took a look at the code quickly, it seems that 70% source code are based
on Linux's igc, which is GPL license. Is Intel's igc dual licensed under the
BSD and GPL licenses now?

whizatit · Jan 26, 2021, 3:45 PM

@dave-1 Inteesting

jimp · Jan 26, 2021, 3:53 PM

The igc driver is in 2.5.0, but support may vary depending on the card. There may be some cards out there not yet covered by the driver or may need IDs added and so on. The only way to know for sure is to try it, or at least compare the IDs of the card against the driver code.

Setarcos · Jun 26, 2021, 11:21 PM

Any updates on this? It looks like the new Netgate 6100 uses the i225-LM and is taking advantage of the support included in 2.5.0+. Is there is a list of tested i225-LM cards somewhere?

stephenw10 · Jun 27, 2021, 1:17 PM

You can see the driver supported devices here:
https://github.com/pfsense/FreeBSD-src/blob/devel-12/sys/dev/igc/igc_hw.h#L44

As far as I know though the only tested NIC is that in the 6100:

igc0@pci0:4:0:0:	class=0x020000 card=0x00008086 chip=0x15f38086 rev=0x01 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Ethernet Controller I225-V'
    class      = network
    subclass   = ethernet

Steve

Setarcos · Jul 25, 2021, 11:53 PM

@stephenw10

I decided to give it a try and picked up a PCIe adapter for my Netgate 7100 and the dual port QNAP version listed by @whizatit and tested with 21.05. The igc driver seems to be correctly detecting both I225-LMs properly, and the port responds properly when forcing speed and duplex (as confirmed by watching ifconfig and the switchport that the I225-LM port is connected to). That said, I have been unable to get the I225-LM port (I am testing with igc0) to receive traffic. Packets show up as "errors in" in the interface counters. arp on the 7100 only shows the I225-LM interface, packet captures only show outbound traffic on the 7100 and captures from a device connected to the I225-LM show outbound traffic and inbound arp traffic from the I225-LM.

I tried disabling hardware checksum offloading, but this alone doesn't appear to have done anything.

Any recommendations for what I should try?

Here are my pciconf, ifconfig and sysctl output for this card:

igc0@pci0:4:0:0:        class=0x020000 card=0xc0021baa chip=0x15f28086 rev=0x03 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Intel(R) Ethernet Controller I225-LM'
    class      = network
    subclass   = ethernet
    bar   [10] = type Memory, range 32, base 0xded00000, size 1048576, enabled
    bar   [1c] = type Memory, range 32, base 0xdef00000, size 16384, enabled
    cap 01[40] = powerspec 3  supports D0 D3  current D0
    cap 05[50] = MSI supports 1 message, 64 bit, vector masks
    cap 11[70] = MSI-X supports 5 messages, enabled
                 Table in map 0x1c[0x0], PBA in map 0x1c[0x2000]
    cap 10[a0] = PCI-Express 2 endpoint max data 128(512) FLR RO NS
                 max read 512
                 link x1(x1) speed 5.0(5.0) ASPM disabled(L1)
    ecap 0001[100] = AER 2 1 fatal 1 non-fatal 0 corrected
    ecap 0003[140] = Serial 1 245ebeffff64ce5b
    ecap 0018[1c0] = LTR 1
    ecap 001f[1f0] = Precision Time Measurement 1
    ecap 001e[1e0] = L1 PM Substates 1
igc1@pci0:7:0:0:        class=0x020000 card=0xc0021baa chip=0x15f28086 rev=0x03 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Intel(R) Ethernet Controller I225-LM'
    class      = network
    subclass   = ethernet
    bar   [10] = type Memory, range 32, base 0xdf000000, size 1048576, enabled
    bar   [1c] = type Memory, range 32, base 0xdf200000, size 16384, enabled
    cap 01[40] = powerspec 3  supports D0 D3  current D0
    cap 05[50] = MSI supports 1 message, 64 bit, vector masks
    cap 11[70] = MSI-X supports 5 messages, enabled
                 Table in map 0x1c[0x0], PBA in map 0x1c[0x2000]
    cap 10[a0] = PCI-Express 2 endpoint max data 128(512) FLR RO NS
                 max read 512
                 link x1(x1) speed 5.0(5.0) ASPM disabled(L1)
    ecap 0001[100] = AER 2 0 fatal 0 non-fatal 0 corrected
    ecap 0003[140] = Serial 1 245ebeffff64ce5a
    ecap 0018[1c0] = LTR 1
    ecap 001f[1f0] = Precision Time Measurement 1
    ecap 001e[1e0] = L1 PM Substates 1

igc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        description: Test
        options=8120b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWFILTER>
        capabilities=f53fbb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,WOL_UCAST,WOL_MCAST,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO,NETMAP,RXCSUM_IPV6,TXCSUM_IPV6>
        ether 24:5e:be:64:ce:5b
        inet6 fe80::265e:beff:fe64:ce5b%igc0 prefixlen 64 scopeid 0x1
        inet 10.222.222.1 netmask 0xffffff00 broadcast 10.222.222.255
        media: Ethernet autoselect (1000baseT <full-duplex>)
        status: active
        supported media:
                media autoselect
                media 2500Base-T
                media 1000baseT
                media 1000baseT mediaopt full-duplex
                media 100baseTX mediaopt full-duplex
                media 100baseTX
                media 10baseT/UTP mediaopt full-duplex
                media 10baseT/UTP
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

dev.igc.0.interrupts.rx_desc_min_thresh: 0
dev.igc.0.interrupts.asserts: 45
dev.igc.0.mac_stats.tso_txd: 0
dev.igc.0.mac_stats.tx_frames_1024_1522: 0
dev.igc.0.mac_stats.tx_frames_512_1023: 0
dev.igc.0.mac_stats.tx_frames_256_511: 0
dev.igc.0.mac_stats.tx_frames_128_255: 0
dev.igc.0.mac_stats.tx_frames_65_127: 0
dev.igc.0.mac_stats.tx_frames_64: 41
dev.igc.0.mac_stats.mcast_pkts_txd: 0
dev.igc.0.mac_stats.bcast_pkts_txd: 41
dev.igc.0.mac_stats.good_pkts_txd: 41
dev.igc.0.mac_stats.total_pkts_txd: 248
dev.igc.0.mac_stats.good_octets_txd: 2624
dev.igc.0.mac_stats.good_octets_recvd: 32709
dev.igc.0.mac_stats.rx_frames_1024_1522: 0
dev.igc.0.mac_stats.rx_frames_512_1023: 37
dev.igc.0.mac_stats.rx_frames_256_511: 0
dev.igc.0.mac_stats.rx_frames_128_255: 15
dev.igc.0.mac_stats.rx_frames_65_127: 14
dev.igc.0.mac_stats.rx_frames_64: 30
dev.igc.0.mac_stats.mcast_pkts_recvd: 68
dev.igc.0.mac_stats.bcast_pkts_recvd: 28
dev.igc.0.mac_stats.good_pkts_recvd: 96
dev.igc.0.mac_stats.total_pkts_recvd: 302
dev.igc.0.mac_stats.xoff_txd: 207
dev.igc.0.mac_stats.xoff_recvd: 0
dev.igc.0.mac_stats.xon_txd: 0
dev.igc.0.mac_stats.xon_recvd: 0
dev.igc.0.mac_stats.alignment_errs: 0
dev.igc.0.mac_stats.crc_errs: 0
dev.igc.0.mac_stats.recv_errs: 0
dev.igc.0.mac_stats.recv_jabber: 0
dev.igc.0.mac_stats.recv_oversize: 0
dev.igc.0.mac_stats.recv_fragmented: 0
dev.igc.0.mac_stats.recv_undersize: 0
dev.igc.0.mac_stats.recv_no_buff: 0
dev.igc.0.mac_stats.missed_packets: 206
dev.igc.0.mac_stats.defer_count: 0
dev.igc.0.mac_stats.sequence_errors: 0
dev.igc.0.mac_stats.symbol_errors: 0
dev.igc.0.mac_stats.collision_count: 0
dev.igc.0.mac_stats.late_coll: 0
dev.igc.0.mac_stats.multiple_coll: 0
dev.igc.0.mac_stats.single_coll: 0
dev.igc.0.mac_stats.excess_coll: 0
dev.igc.0.queue_rx_3.rx_irq: 0
dev.igc.0.queue_rx_3.rxd_tail: 128
dev.igc.0.queue_rx_3.rxd_head: 0
dev.igc.0.queue_rx_2.rx_irq: 0
dev.igc.0.queue_rx_2.rxd_tail: 128
dev.igc.0.queue_rx_2.rxd_head: 0
dev.igc.0.queue_rx_1.rx_irq: 0
dev.igc.0.queue_rx_1.rxd_tail: 128
dev.igc.0.queue_rx_1.rxd_head: 0
dev.igc.0.queue_rx_0.rx_irq: 0
dev.igc.0.queue_rx_0.rxd_tail: 128
dev.igc.0.queue_rx_0.rxd_head: 0
dev.igc.0.queue_tx_3.tx_irq: 0
dev.igc.0.queue_tx_3.txd_tail: 0
dev.igc.0.queue_tx_3.txd_head: 0
dev.igc.0.queue_tx_2.tx_irq: 0
dev.igc.0.queue_tx_2.txd_tail: 0
dev.igc.0.queue_tx_2.txd_head: 0
dev.igc.0.queue_tx_1.tx_irq: 0
dev.igc.0.queue_tx_1.txd_tail: 0
dev.igc.0.queue_tx_1.txd_head: 0
dev.igc.0.queue_tx_0.tx_irq: 0
dev.igc.0.queue_tx_0.txd_tail: 41
dev.igc.0.queue_tx_0.txd_head: 41
dev.igc.0.fc_low_water: 32752
dev.igc.0.fc_high_water: 32768
dev.igc.0.rx_control: 71335966
dev.igc.0.device_control: 404489793
dev.igc.0.watchdog_timeouts: 0
dev.igc.0.rx_overruns: 1
dev.igc.0.link_irq: 4
dev.igc.0.dropped: 0
dev.igc.0.eee_control: 1
dev.igc.0.itr: 488
dev.igc.0.tx_abs_int_delay: 66
dev.igc.0.rx_abs_int_delay: 66
dev.igc.0.tx_int_delay: 66
dev.igc.0.rx_int_delay: 0
dev.igc.0.rs_dump: 0
dev.igc.0.reg_dump: General Registers
        CTRL     181c0641
        STATUS   40380683
        CTRL_EXIT        10000040

Interrupt Registers
        ICR      00000000

RX Registers
        RCTL     0440801e
        RDLEN    00004000
        RDH      00000000
        RDT      00000080
        RXDCTL   02040808
        RDBAL    033a8000
        RDBAH    00000001

TX Registers
        TCTL     a503f0fa
        TDBAL    0336a000
        TDBAH    00000001
        TDLEN    00004000
        TDH      00000029
        TDT      00000029
        TXDCTL   0201011f
        TDFH     00000000
        TDFT     00000000
        TDFHS    00000000
        TDFPC    00000000


dev.igc.0.fc: 3
dev.igc.0.debug: -1
dev.igc.0.nvm: -1
dev.igc.0.iflib.rxq3.rxq_fl0.buf_size: 2048
dev.igc.0.iflib.rxq3.rxq_fl0.credits: 128
dev.igc.0.iflib.rxq3.rxq_fl0.cidx: 0
dev.igc.0.iflib.rxq3.rxq_fl0.pidx: 128
dev.igc.0.iflib.rxq2.rxq_fl0.buf_size: 2048
dev.igc.0.iflib.rxq2.rxq_fl0.credits: 128
dev.igc.0.iflib.rxq2.rxq_fl0.cidx: 0
dev.igc.0.iflib.rxq2.rxq_fl0.pidx: 128
dev.igc.0.iflib.rxq1.rxq_fl0.buf_size: 2048
dev.igc.0.iflib.rxq1.rxq_fl0.credits: 128
dev.igc.0.iflib.rxq1.rxq_fl0.cidx: 0
dev.igc.0.iflib.rxq1.rxq_fl0.pidx: 128
dev.igc.0.iflib.rxq0.rxq_fl0.buf_size: 2048
dev.igc.0.iflib.rxq0.rxq_fl0.credits: 128
dev.igc.0.iflib.rxq0.rxq_fl0.cidx: 0
dev.igc.0.iflib.rxq0.rxq_fl0.pidx: 128
dev.igc.0.iflib.txq3.r_abdications: 0
dev.igc.0.iflib.txq3.r_restarts: 0
dev.igc.0.iflib.txq3.r_stalls: 0
dev.igc.0.iflib.txq3.r_starts: 0
dev.igc.0.iflib.txq3.r_drops: 0
dev.igc.0.iflib.txq3.r_enqueues: 0
dev.igc.0.iflib.txq3.ring_state: pidx_head: 0000 pidx_tail: 0000 cidx: 0000 state: IDLE
dev.igc.0.iflib.txq3.txq_cleaned: 0
dev.igc.0.iflib.txq3.txq_processed: 0
dev.igc.0.iflib.txq3.txq_in_use: 0
dev.igc.0.iflib.txq3.txq_cidx_processed: 0
dev.igc.0.iflib.txq3.txq_cidx: 0
dev.igc.0.iflib.txq3.txq_pidx: 0
dev.igc.0.iflib.txq3.no_tx_dma_setup: 0
dev.igc.0.iflib.txq3.txd_encap_efbig: 0
dev.igc.0.iflib.txq3.tx_map_failed: 0
dev.igc.0.iflib.txq3.no_desc_avail: 0
dev.igc.0.iflib.txq3.mbuf_defrag_failed: 0
dev.igc.0.iflib.txq3.m_pullups: 0
dev.igc.0.iflib.txq3.mbuf_defrag: 0
dev.igc.0.iflib.txq2.r_abdications: 0
dev.igc.0.iflib.txq2.r_restarts: 0
dev.igc.0.iflib.txq2.r_stalls: 0
dev.igc.0.iflib.txq2.r_starts: 0
dev.igc.0.iflib.txq2.r_drops: 0
dev.igc.0.iflib.txq2.r_enqueues: 0
dev.igc.0.iflib.txq2.ring_state: pidx_head: 0000 pidx_tail: 0000 cidx: 0000 state: IDLE
dev.igc.0.iflib.txq2.txq_cleaned: 0
dev.igc.0.iflib.txq2.txq_processed: 0
dev.igc.0.iflib.txq2.txq_in_use: 0
dev.igc.0.iflib.txq2.txq_cidx_processed: 0
dev.igc.0.iflib.txq2.txq_cidx: 0
dev.igc.0.iflib.txq2.txq_pidx: 0
dev.igc.0.iflib.txq2.no_tx_dma_setup: 0
dev.igc.0.iflib.txq2.txd_encap_efbig: 0
dev.igc.0.iflib.txq2.tx_map_failed: 0
dev.igc.0.iflib.txq2.no_desc_avail: 0
dev.igc.0.iflib.txq2.mbuf_defrag_failed: 0
dev.igc.0.iflib.txq2.m_pullups: 0
dev.igc.0.iflib.txq2.mbuf_defrag: 0
dev.igc.0.iflib.txq1.r_abdications: 0
dev.igc.0.iflib.txq1.r_restarts: 0
dev.igc.0.iflib.txq1.r_stalls: 0
dev.igc.0.iflib.txq1.r_starts: 0
dev.igc.0.iflib.txq1.r_drops: 0
dev.igc.0.iflib.txq1.r_enqueues: 0
dev.igc.0.iflib.txq1.ring_state: pidx_head: 0000 pidx_tail: 0000 cidx: 0000 state: IDLE
dev.igc.0.iflib.txq1.txq_cleaned: 0
dev.igc.0.iflib.txq1.txq_processed: 0
dev.igc.0.iflib.txq1.txq_in_use: 0
dev.igc.0.iflib.txq1.txq_cidx_processed: 0
dev.igc.0.iflib.txq1.txq_cidx: 0
dev.igc.0.iflib.txq1.txq_pidx: 0
dev.igc.0.iflib.txq1.no_tx_dma_setup: 0
dev.igc.0.iflib.txq1.txd_encap_efbig: 0
dev.igc.0.iflib.txq1.tx_map_failed: 0
dev.igc.0.iflib.txq1.no_desc_avail: 0
dev.igc.0.iflib.txq1.mbuf_defrag_failed: 0
dev.igc.0.iflib.txq1.m_pullups: 0
dev.igc.0.iflib.txq1.mbuf_defrag: 0
dev.igc.0.iflib.txq0.r_abdications: 0
dev.igc.0.iflib.txq0.r_restarts: 0
dev.igc.0.iflib.txq0.r_stalls: 0
dev.igc.0.iflib.txq0.r_starts: 41
dev.igc.0.iflib.txq0.r_drops: 0
dev.igc.0.iflib.txq0.r_enqueues: 41
dev.igc.0.iflib.txq0.ring_state: pidx_head: 0041 pidx_tail: 0041 cidx: 0041 state: IDLE
dev.igc.0.iflib.txq0.txq_cleaned: 0
dev.igc.0.iflib.txq0.txq_processed: 40
dev.igc.0.iflib.txq0.txq_in_use: 41
dev.igc.0.iflib.txq0.txq_cidx_processed: 40
dev.igc.0.iflib.txq0.txq_cidx: 0
dev.igc.0.iflib.txq0.txq_pidx: 41
dev.igc.0.iflib.txq0.no_tx_dma_setup: 0
dev.igc.0.iflib.txq0.txd_encap_efbig: 0
dev.igc.0.iflib.txq0.tx_map_failed: 0
dev.igc.0.iflib.txq0.no_desc_avail: 0
dev.igc.0.iflib.txq0.mbuf_defrag_failed: 0
dev.igc.0.iflib.txq0.m_pullups: 0
dev.igc.0.iflib.txq0.mbuf_defrag: 0
dev.igc.0.iflib.override_nrxds: 0
dev.igc.0.iflib.override_ntxds: 0
dev.igc.0.iflib.separate_txrx: 0
dev.igc.0.iflib.core_offset: 0
dev.igc.0.iflib.tx_abdicate: 0
dev.igc.0.iflib.rx_budget: 0
dev.igc.0.iflib.disable_msix: 0
dev.igc.0.iflib.override_qs_enable: 0
dev.igc.0.iflib.override_nrxqs: 0
dev.igc.0.iflib.override_ntxqs: 0
dev.igc.0.iflib.driver_version: 1
dev.igc.0.%parent: pci4
dev.igc.0.%pnpinfo: vendor=0x8086 device=0x15f2 subvendor=0x1baa subdevice=0xc002 class=0x020000
dev.igc.0.%location: slot=0 function=0 dbsf=pci0:4:0:0
dev.igc.0.%driver: igc
dev.igc.0.%desc: Intel(R) PRO/1000 PCI-Express Network Driver

stephenw10 · Jul 26, 2021, 2:00 AM

It shows that at all link rates?

Setarcos · Jul 26, 2021, 2:06 AM

@stephenw10 said in Intel Ethernet Controller I225-LM Support?:

It shows that at all link rates?

Yes, at least for 10,100, and 1000 (both full and half duplex) it does. I don't have a 2500Base-T equipped device to test with yet. Note that ARPs transmitted from the I225-LM port to another device connected to the port are getting through to the device, but the responses back from the device do not appear to be making it back to the I225-LM as the ARP request (from the I225-LM) and reply (from the device) continuously repeat. Here is a sample from when attempting to ping the connected test device on 10.222.222.2 from pfSense:

test device capture

19:03:57.641021	1209	QNAP_64:ce:5b	Broadcast	ARP	60	Who has 10.222.222.2? Tell 10.222.222.1
19:03:57.641030	1210	SamsungE_9c:a0:8e	QNAP_64:ce:5b	ARP	42	10.222.222.2 is at 98:83:89:9c:a0:8e
19:03:58.651569	1211	QNAP_64:ce:5b	Broadcast	ARP	60	Who has 10.222.222.2? Tell 10.222.222.1
19:03:58.651594	1212	SamsungE_9c:a0:8e	QNAP_64:ce:5b	ARP	42	10.222.222.2 is at 98:83:89:9c:a0:8e
19:03:59.670915	1213	QNAP_64:ce:5b	Broadcast	ARP	60	Who has 10.222.222.2? Tell 10.222.222.1
19:03:59.670930	1214	SamsungE_9c:a0:8e	QNAP_64:ce:5b	ARP	42	10.222.222.2 is at 98:83:89:9c:a0:8e

pfSense capture

19:03:57.313905 ARP, Request who-has 10.222.222.2 tell 10.222.222.1, length 28
19:03:58.324154 ARP, Request who-has 10.222.222.2 tell 10.222.222.1, length 28
19:03:59.343768 ARP, Request who-has 10.222.222.2 tell 10.222.222.1, length 28