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Cameron Taggart
Asked: 2016-08-12 12:23:34 +0800 CST

`ip link` em1 = p4p1 吗？

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我正在尝试使用 Ubuntu 14.04 远程管理戴尔服务器。该服务器有一个 540-BBW Broadcom 5720 QP 1Gb 网络子卡。Broadcom文档 说它有两个 PCIe 插槽，每个插槽有两个以太网端口。

我通读了这些biosdevname文档和节目p<slot>p<ethernet port>。ip link显示 p4p1、p4p2、p6p1 和 p6p2。那讲得通。该卡必须使用插槽 4 和 6。

对我来说没有意义的是ip link还显示 em1、em2、em3、em4。这些被描述为嵌入式网络接口。这些不是上述 PCIe 以太网端口的别名吗？如果它们是别名，我怎么知道哪个对应于另一个？换句话说，em1 是否对应与 p4p1 相同的硬件端口？

cameron@echo:~$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 44:a8:42:2b:4c:39 brd ff:ff:ff:ff:ff:ff
3: em2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 44:a8:42:2b:4c:3a brd ff:ff:ff:ff:ff:ff
4: em3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 44:a8:42:2b:4c:3b brd ff:ff:ff:ff:ff:ff
5: em4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 44:a8:42:2b:4c:3c brd ff:ff:ff:ff:ff:ff
6: p4p1: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
    link/ether a0:36:9f:12:11:e8 brd ff:ff:ff:ff:ff:ff
7: p4p2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether a0:36:9f:12:11:ea brd ff:ff:ff:ff:ff:ff
8: p6p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 00:07:43:33:51:00 brd ff:ff:ff:ff:ff:ff
9: p6p2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 00:07:43:33:51:08 brd ff:ff:ff:ff:ff:ff
10: lxcbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/ether 1e:c4:f7:44:50:cd brd ff:ff:ff:ff:ff:ff
11: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
    link/ether 02:42:f4:3d:2c:be brd ff:ff:ff:ff:ff:ff

更新 1. 如果有帮助，这里是 PCI 信息。可能是我对硬件的看法错了。很高兴知道上面的哪个链接对应于这些 PCI 设备中的哪个。

cameron@echo:~$ lspci -nn | grep Ethernet
01:00.0 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe [14e4:165f]
01:00.1 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe [14e4:165f]
02:00.0 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe [14e4:165f]
02:00.1 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe [14e4:165f]
04:00.0 Ethernet controller [0200]: Chelsio Communications Inc T520-CR Unified Wire Ethernet Controller [1425:5001]
04:00.1 Ethernet controller [0200]: Chelsio Communications Inc T520-CR Unified Wire Ethernet Controller [1425:5001]
04:00.2 Ethernet controller [0200]: Chelsio Communications Inc T520-CR Unified Wire Ethernet Controller [1425:5001]
04:00.3 Ethernet controller [0200]: Chelsio Communications Inc T520-CR Unified Wire Ethernet Controller [1425:5001]
04:00.4 Ethernet controller [0200]: Chelsio Communications Inc T520-CR Unified Wire Ethernet Controller [1425:5401]
82:00.0 Ethernet controller [0200]: Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 [8086:1528] (rev 01)
82:00.1 Ethernet controller [0200]: Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 [8086:1528] (rev 01)
networking

1 个回答

  1. Best Answer

    答案是否定的，有三个独立的网络接口。从这些文档中，我了解到sudo lshw -class network可用于查看哪些逻辑名称与每个 pci 地址相关联。

    *-network:0
       description: Ethernet interface
       product: NetXtreme BCM5720 Gigabit Ethernet PCIe
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       logical name: em1
       version: 00
       serial: 44:a8:42:2b:4c:39
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi msix pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.137 duplex=full firmware=FFV7.10.61 bc 5720-v1.36 ip=10.1.14.22 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:89 memory:93330000-9333ffff memory:93340000-9334ffff memory:93350000-9335ffff memory:93700000-9373ffff

  *-network:0 DISABLED
       description: Ethernet interface
       product: Ethernet Controller 10-Gigabit X540-AT2
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:82:00.0
       logical name: p4p1
       version: 01
       serial: a0:36:9f:12:11:e8
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi msix pciexpress bus_master cap_list rom ethernet physical tp 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=ixgbe driverversion=4.2.1-k firmware=0x80000389 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:90 memory:c8200000-c83fffff memory:c8404000-c8407fff memory:c8600000-c867ffff memory:c8700000-c87fffff memory:c8800000-c88fffff
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