Dear Members,
To further narrow down the problem, I am evaluating single ixl link
(Intel Fortville NIC) on FreeBSD platform.
Single ixl link is _NOT_ a part of Lagg.
*Issue*
Change in MAC address on a ixl (Intel Fortville NIC) link does not
reflect on NIC.
Ping stops working after change in MAC address. Ping works, if PROMISC
mode is set.
*Steps to reproduce the problem*
_/*# ifconfig ixl1*/_
ixl1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9000
options=6407bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
ether 68:05:ca:35:97:29
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: Ethernet autoselect (10Gbase-Twinax <full-duplex>)
status: active
_# ping XYZ/*/*
*/*/_Ping Works_/*/*
*/*/_
_/*# ifconfig ixl1 ether 58:04:89:12:34:56
*/_Assign new MAC to the link.
_# ping XYZ/*/*
*/*/_Ping does _NOT_ Work
*Bug Analysis*
While working on this issue, I found bug in the code.
Refer 'ixl_init_locked(struct ixl_pf *pf) function' present in
'dev/ixl/if_ixl.c' file.
1080 /* Get the latest mac address... User might use a LAA */
1081 bcopy(IF_LLADDR(vsi->ifp), tmpaddr,
1082 I40E_ETH_LENGTH_OF_ADDRESS);
* 1083 if (!cmp_etheraddr(hw->mac.addr, tmpaddr) && **
** 1084 i40e_validate_mac_addr(tmpaddr)) {*
1085 bcopy(tmpaddr, hw->mac.addr,
1086 I40E_ETH_LENGTH_OF_ADDRESS);
1087 ret = i40e_aq_mac_address_write(hw,
1088 I40E_AQC_WRITE_TYPE_LAA_ONLY,
1089 hw->mac.addr, NULL);
1090 if (ret) {
1091 device_printf(dev, "LLA address"
1092 "change failed!!\n");
1093 return;
1094 }
1095 }
Refer lines 1083 & 1084 - '*i40e_validate_mac_addr(tmpaddr)*' function
returns 0 on success.
Therefore 'i40e_aq_mac_address_write()' function is not getting called.
Bug Fix is as Follows -
if (!cmp_etheraddr(hw->mac.addr, tmpaddr) &&
i40e_validate_mac_addr(tmpaddr) *== I40E_SUCCESS*)
After this fix, 'i40e_aq_mac_address_write()' function is getting called.
*Conclusion*
This 'bug fix' could not resolve the Ping issue.
Appreciate your views on this matter.
Thanks,
Pushkar Kothavade
On Thursday 18 June 2015 12:00 PM, Pushkar Kothavade wrote:
Dear Members,
I am part of Panasas. I am evaluating 'Lagg-LACP performance and
robustness' over Intel Fortville NIC (IXL) on Intel Taylor Pass
platform with FreeBSD-HOL [11-CURRENT] installed. Lagg-LACP feature
works fine (with satisfactory performance) when Promiscuous mode is
enabled on the Lagg.
If Promiscuous mode is disabled, in that case even basic Lagg
functionality does not work.
*Setup Information : *
- Machine (Intel Taylor Pass) is running FreeBSD-HOL (11 current)
- Machine has 'Intel Fortville NIC (Intel Ethernet Controller XL710)'
installed with special firmware to support four 10Gbps ports with
breakout cable
- Breakout cable is used with one of the 40GB ports which creates four
10GB ports
- All four 10Gbps ports are connected to Dell Force 10 Switch
- Lagg-LACP has been configured on all four 10GB ports of the Machine
and on Switch ports as well
*Problem Statement :*
# When machine sends an Arp-request then interface does not receive
Arp-reply
- Arp request sent by the machine is successful
- Switch is able to get Arp broadcast request sent by the machine
- Switch sends back unicast Arp-reply to machine
- But still driver does not receive Arp-reply
# Even after adding static Arp entry in machine's Arp table, ping fails
# Configured same MAC address on all 4 interfaces which are part of
Lagg, still ping fails
Is there any problem with MAC filtering ?
*Workaround : *
- After putting Lagg interface in promiscuous mode, network interface
seems to work properly.
*Platform Information :*
Machine - Intel Taylor Pass server board
OS - FreeBSD HOL (11.0 Current)
NIC - Intel Fortville NIC (Intel Ethernet Controller XL710) - Find
more information as below
Switch - Dell Force 10 Switch
<Snip>
ixl0: <Intel(R) Ethernet Connection XL710 Driver, Version - 1.4.1> mem
0x383ffe800000-0x383ffeffffff,0x383fff818000-0x383fff81ffff irq 42 at
device 0.0 on pci4
ixl0: Using MSIX interrupts with 13 vectors
ixl0: f4.33 a1.2 n04.42 e80001935
ixl0: Ethernet address: 68:05:ca:35:97:28
ixl0: PCI Express Bus: Speed 8.0GT/s Width x8
ixl1: <Intel(R) Ethernet Connection XL710 Driver, Version - 1.4.1> mem
0x383ffe000000-0x383ffe7fffff,0x383fff810000-0x383fff817fff irq 42 at
device 0.1 on pci4
ixl1: Using MSIX interrupts with 13 vectors
ixl1: f4.33 a1.2 n04.42 e80001935
ixl1: Ethernet address: 68:05:ca:35:97:29
ixl1: PCI Express Bus: Speed 8.0GT/s Width x8
ixl2: <Intel(R) Ethernet Connection XL710 Driver, Version - 1.4.1> mem
0x383ffd800000-0x383ffdffffff,0x383fff808000-0x383fff80ffff irq 42 at
device 0.2 on pci4
ixl2: Using MSIX interrupts with 13 vectors
ixl2: f4.33 a1.2 n04.42 e80001935
ixl2: Ethernet address: 68:05:ca:35:97:2a
ixl2: PCI Express Bus: Speed 8.0GT/s Width x8
ixl3: <Intel(R) Ethernet Connection XL710 Driver, Version - 1.4.1> mem
0x383ffd000000-0x383ffd7fffff,0x383fff800000-0x383fff807fff irq 42 at
device 0.3 on pci4
ixl3: Using MSIX interrupts with 13 vectors
ixl3: f4.33 a1.2 n04.42 e80001935
ixl3: Ethernet address: 68:05:ca:35:97:2b
ixl3: PCI Express Bus: Speed 8.0GT/s Width x8
acpi0: Power Button (fixed)
ixl0: <Intel(R) Ethernet Connection XL710 Driver, Version - 1.4.1> mem
0x383ffe800000-0x383ffeffffff,0x383fff818000-0x383fff81ffff irq 42 at
device 0.0 on pci4
ixl0: Using MSIX interrupts with 13 vectors
ixl0: f4.33 a1.2 n04.42 e80001935
ixl0: Ethernet address: 68:05:ca:35:97:28
ixl0: PCI Express Bus: Speed 8.0GT/s Width x8
ixl1: <Intel(R) Ethernet Connection XL710 Driver, Version - 1.4.1> mem
0x383ffe000000-0x383ffe7fffff,0x383fff810000-0x383fff817fff irq 42 at
device 0.1 on pci4
ixl1: Using MSIX interrupts with 13 vectors
ixl1: f4.33 a1.2 n04.42 e80001935
ixl1: Ethernet address: 68:05:ca:35:97:29
ixl1: PCI Express Bus: Speed 8.0GT/s Width x8
ixl2: <Intel(R) Ethernet Connection XL710 Driver, Version - 1.4.1> mem
0x383ffd800000-0x383ffdffffff,0x383fff808000-0x383fff80ffff irq 42 at
device 0.2 on pci4
ixl2: Using MSIX interrupts with 13 vectors
ixl2: f4.33 a1.2 n04.42 e80001935
ixl2: Ethernet address: 68:05:ca:35:97:2a
ixl2: PCI Express Bus: Speed 8.0GT/s Width x8
ixl3: <Intel(R) Ethernet Connection XL710 Driver, Version - 1.4.1> mem
0x383ffd000000-0x383ffd7fffff,0x383fff800000-0x383fff807fff irq 42 at
device 0.3 on pci4
ixl3: Using MSIX interrupts with 13 vectors
ixl3: f4.33 a1.2 n04.42 e80001935
ixl3: Ethernet address: 68:05:ca:35:97:2b
ixl3: PCI Express Bus: Speed 8.0GT/s Width x8
<Snip>
Thanks,
Pushkar Kothavade
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