我們這一節(jié)來看Port

一般來說一個(gè)Port就是一個(gè)Interface，當(dāng)然也有一個(gè)Port對應(yīng)多個(gè)Interface的情況，成為Bond

VLAN Configuration

Port的一個(gè)重要的方面就是VLAN Configuration，有兩種模式：

• trunk port，這個(gè)port不配置tag，配置trunks，如果trunks為空，則所有的VLAN都trunk，也就意味著對于所有的VLAN的包，本身帶什么VLAN ID，就是攜帶者什么VLAN ID，如果沒有設(shè)置VLAN，就屬于VLAN 0，全部允許通過。如果trunks不為空，則僅僅帶著這些VLAN ID的包通過。
• access port，這個(gè)port配置tag，從這個(gè)port進(jìn)來的包會被打上這個(gè)tag，如果從其他的trunk port中進(jìn)來的本身就帶有VLAN ID的包，如果VLAN ID等于tag，則會從這個(gè)port發(fā)出，從其他的access port上來的包，如果tag相同，也會被forward到這個(gè)port。從access port發(fā)出的包不帶VLAN ID。如果一個(gè)本身帶VLAN ID的包到達(dá)access port，即便VLAN ID等于tag，也會被拋棄。

我們創(chuàng)建下面的拓?fù)鋪碜鲆粋€(gè)實(shí)驗(yàn)：

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sudo ovs-vsctl add-port helloworld first_br

sudo ovs-vsctl add-port helloworld second_br

sudo ovs-vsctl add-port helloworld third_br

sudo ovs-vsctl set Port vnet8 tag=101

sudo ovs-vsctl set Port vnet9 tag=102

sudo ovs-vsctl set Port vnet10 tag=103

sudo ovs-vsctl set Port first_br tag=103

sudo ovs-vsctl clear Port second_br tag

sudo ovs-vsctl set Port third_br trunks=101,102

sudo ovs-vsctl set bridge helloworld flood-vlans=101,102,103

sudo ovs-vsctl -- --id=@mirror get Mirror mirrorvnet9 -- remove Bridge helloworld mirrors @mirror

$ sudo ovs-vsctl show
c24322e6-8453-402a-afaf-64757ef231e9
??? Bridge helloworld
??????? Port "vnet8"
??????????? tag: 101
??????????? Interface "vnet8"
??????? Port first_br
??????????? tag: 103
??????????? Interface first_br
??????? Port second_br
??????????? Interface second_br
??????? Port "vnet10"
??????????? tag: 103
??????????? Interface "vnet10"
??????? Port helloworld
??????????? Interface helloworld
??????????????? type: internal
??????? Port "vnet9"
??????????? tag: 102
??????????? Interface "vnet9"
??????? Port third_br
??????????? trunks: [101, 102]
??????????? Interface third_br
??? ovs_version: "2.0.1"

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我們首先從10.10.10.3來ping 10.10.10.4，應(yīng)該first_if和second_if能夠收到包。

first_if收到包了，從first_br出來的包頭是沒有VLAN ID的

$ sudo tcpdump? -n -e -i first_if arp
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on first_if, link-type EN10MB (Ethernet), capture size 65535 bytes
23:22:45.707470 ca:d4:fd:47:a6:ce > 52:54:00:9b:d5:be, ethertype ARP (0x0806), length 42: Request who-has 10.10.10.3 tell 10.10.10.4, length 28
23:22:45.708170 52:54:00:9b:d5:be > ca:d4:fd:47:a6:ce, ethertype ARP (0x0806), length 42: Reply 10.10.10.3 is-at 52:54:00:9b:d5:be, length 28

second_if也收到包了，由于second_br是trunk port，因而出來的包頭是有VLAN ID的，103

$ sudo tcpdump? -n -e -i second_if arp
tcpdump: WARNING: second_br: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on second_br, link-type EN10MB (Ethernet), capture size 65535 bytes
23:22:45.707727 ca:d4:fd:47:a6:ce > 52:54:00:9b:d5:be, ethertype 802.1Q (0x8100), length 46: vlan 103, p 0, ethertype ARP, Request who-has 10.10.10.3 tell 10.10.10.4, length 28
23:22:45.708176 52:54:00:9b:d5:be > ca:d4:fd:47:a6:ce, ethertype 802.1Q (0x8100), length 46: vlan 103, p 0, ethertype ARP, Reply 10.10.10.3 is-at 52:54:00:9b:d5:be, length 28

third_if收不到包

$ sudo tcpdump? -n -e -i third_if arp
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on third_if, link-type EN10MB (Ethernet), capture size 65535 bytes

然后我們從10.10.10.1在ping 10.10.10.6，則second_if和third_if可以收到包

first_if收不到包

second_br能夠收到包，而且包頭里面是VLAN ID = 101

$ sudo tcpdump? -n -e -i second_br arp
tcpdump: WARNING: second_br: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on second_br, link-type EN10MB (Ethernet), capture size 65535 bytes
23:27:22.645546 52:54:00:9b:d5:bc > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 101, p 0, ethertype ARP, Request who-has 10.10.10.6 tell 10.10.10.1, length 28
23:27:23.644828 52:54:00:9b:d5:bc > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 101, p 0, ethertype ARP, Request who-has 10.10.10.6 tell 10.10.10.1, length 28
23:27:24.644837 52:54:00:9b:d5:bc > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 101, p 0, ethertype ARP, Request who-has 10.10.10.6 tell 10.10.10.1, length 28
23:27:25.651223 52:54:00:9b:d5:bc > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 101, p 0, ethertype ARP, Request who-has 10.10.10.6 tell 10.10.10.1, length 28
23:27:26.648770 52:54:00:9b:d5:bc > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 101, p 0, ethertype ARP, Request who-has

third_if也能收到包，而且包頭里面是VLAN ID =101

$ sudo tcpdump? -n -e -i third_if arp
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on third_if, link-type EN10MB (Ethernet), capture size 65535 bytes
23:27:22.645561 52:54:00:9b:d5:bc > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 101, p 0, ethertype ARP, Request who-has 10.10.10.6 tell 10.10.10.1, length 28
23:27:23.644844 52:54:00:9b:d5:bc > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 101, p 0, ethertype ARP, Request who-has 10.10.10.6 tell 10.10.10.1, length 28
23:27:24.644853 52:54:00:9b:d5:bc > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 101, p 0, ethertype ARP, Request who-has 10.10.10.6 tell 10.10.10.1, length 28
23:27:25.651238 52:54:00:9b:d5:bc > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 101, p 0, ethertype ARP, Request who-has 10.10.10.6 tell 10.10.10.1, length 28

最后我們從10.10.10.2來ping 10.10.10.5，則second_if和third_if可以收到包

first_if收不到包

second_br能夠收到包，而且包頭里面是VLAN ID = 102

$ sudo tcpdump? -n -e -i second_br arp
tcpdump: WARNING: second_br: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on second_br, link-type EN10MB (Ethernet), capture size 65535 bytes
23:31:17.641237 52:54:00:9b:d5:bd > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 102, p 0, ethertype ARP, Request who-has 10.10.10.5 tell 10.10.10.2, length 28
23:31:18.638875 52:54:00:9b:d5:bd > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 102, p 0, ethertype ARP, Request who-has 10.10.10.5 tell 10.10.10.2, length 28
23:31:19.638881 52:54:00:9b:d5:bd > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 102, p 0, ethertype ARP, Request who-has 10.10.10.5 tell 10.10.10.2, length 28
23:31:20.657189 52:54:00:9b:d5:bd > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 102, p 0, ethertype ARP, Request who-has 10.10.10.5 tell 10.10.10.2, length 28
23:31:21.654874 52:54:00:9b:d5:bd > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 102, p 0, ethertype ARP, Request who-has 10.10.10.5 tell 10.10.10.2, length 28

third_if也能收到包，而且包頭里面是VLAN ID =103

$ sudo tcpdump? -n -e -i third_if arp
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on third_if, link-type EN10MB (Ethernet), capture size 65535 bytes
23:31:22.654872 52:54:00:9b:d5:bd > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 102, p 0, ethertype ARP, Request who-has 10.10.10.5 tell 10.10.10.2, length 28
23:31:23.672558 52:54:00:9b:d5:bd > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 102, p 0, ethertype ARP, Request who-has 10.10.10.5 tell 10.10.10.2, length 28
23:31:24.670893 52:54:00:9b:d5:bd > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 102, p 0, ethertype ARP, Request who-has 10.10.10.5 tell 10.10.10.2, length 28
23:31:25.670796 52:54:00:9b:d5:bd > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 102, p 0, ethertype ARP, Request who-has 10.10.10.5 tell 10.10.10.2, length 28

Bonding Configuration

bond_mode:

• balance-slb: Balances flows among slaves based on source MAC address and output VLAN
• active-backup:Assigns all flows to one slave, failing over to a backup slave when the active slave is disabled.

如果bridge的另一端支持LACP協(xié)議，則還有兩種狀態(tài)：

• balance?tcp：Balances flows among slaves based on L2, L3, and L4 protocol information such as destination MAC address, IP address, and TCP port.
• stable：Attempts to always assign a given flow to the same slave consistently.

other_config : bond-detect-mode:

• Defaults to carrier which uses each interface’s carrier to detect failures.
• When set to miimon, will check for failures by polling each interface’s MII. 僅僅check接口是否正常

LACP Configuration:

LACP：Link Aggregation Control Protocol

Link Aggregation

• Link aggregation allows you to bond multiple parallel links into a single virtual link (from the STP perspective).
• With parallel links being replaced by a single link, STP detects no loops and all the physical links can be fully utilized.
• Traditional LA : port channel, Etherchannel, link bonding or multi-link trunking

Traditional Link Aggregation

• A port channel bundles up to eight individual interfaces into a group to provide increased bandwidth and redundancy.
• Port channeling also load balances traffic across these physical interfaces.
• You create a port channel by bundling compatible interfaces.
• You can configure and run either static port channels or ports channels running the Link Aggregation Control Protocol (LACP).

LACP (Link Aggregation Control Protocol)

• individual links can be combined into LACP port channels and channel groups
  • Static LACP : creation of channel groups and addition of ports are manually configured. LACP is to determine the ports are selected or standby
  • Dynamic LACP : all above are negotiated via LACPDU between both sides

Multi-Chassis Link Aggregation

• In Multichassis EtherChannel (MCEC), the DHD is dual-homed to two upstream PoAs(points of attachment).
  • The DHD is incapable of running any loop prevention control protocol such as Multiple Spanning Tree (MST).
• One method is to place the DHD's uplinks in a LAG, commonly referred to as EtherChannel. (LACP enabled).
• LACP is a link-level control protocol that allows the dynamic negotiation and establishment of LAGs.
• Multichassis LACP: An extension of the LACP implementation to PoAs is required to convey to a DHD that it is connected to a single virtual
  LACP peer and not to two disjointed devices.

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我們創(chuàng)建下面的拓?fù)浣Y(jié)構(gòu)：

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$ sudo ovs-vsctl add-bond hello bond0 first_br second_br
$ sudo ovs-vsctl add-bond world bond1 first_if second_if
$ sudo ovs-vsctl show
c24322e6-8453-402a-afaf-64757ef231e9
??? Bridge world
??????? Port world
??????????? Interface world
??????????????? type: internal
??????? Port "bond1"
??????????? Interface second_if
??????????? Interface first_if
??????? Port "vnet10"
??????????? Interface "vnet10"
??????? Port "vnet11"
??????????? Interface "vnet11"
??? Bridge hello
??????? Port "vnet8"
??????????? Interface "vnet8"
??????? Port "vnet9"
??????????? Interface "vnet9"
??????? Port hello
??????????? Interface hello
??????????????? type: internal
??????? Port "bond0"
??????????? Interface first_br
??????????? Interface second_br
??? ovs_version: "2.0.1"

$ sudo ovs-vsctl set Port bond0 lacp=active
$ sudo ovs-vsctl set Port bond1 lacp=active

$ sudo ovs-appctl bond/show
---- bond0 ----
bond_mode: active-backup
bond-hash-basis: 0
updelay: 0 ms
downdelay: 0 ms
lacp_status: negotiated

slave first_br: enabled
??????? active slave
??????? may_enable: true

slave second_br: enabled
??????? may_enable: true

---- bond1 ----
bond_mode: active-backup
bond-hash-basis: 0
updelay: 0 ms
downdelay: 0 ms
lacp_status: negotiated

slave first_if: enabled
??????? active slave
??????? may_enable: true

slave second_if: enabled
??????? may_enable: true

$ sudo ovs-appctl lacp/show
---- bond0 ----
??????? status: active negotiated
??????? sys_id: 4a:f5:ee:f2:40:40
??????? sys_priority: 65534
??????? aggregation key: 3
??????? lacp_time: slow

slave: first_br: current attached
??????? port_id: 3
??????? port_priority: 65535
??????? may_enable: true

??????? actor sys_id: 4a:f5:ee:f2:40:40
??????? actor sys_priority: 65534
??????? actor port_id: 3
??????? actor port_priority: 65535
??????? actor key: 3
??????? actor state: activity aggregation synchronized collecting distributing

??????? partner sys_id: 8a:7b:f0:8b:94:40
??????? partner sys_priority: 65534
??????? partner port_id: 4
??????? partner port_priority: 65535
??????? partner key: 4
??????? partner state: activity aggregation synchronized collecting distributing

slave: second_br: current attached
??????? port_id: 4
??????? port_priority: 65535
??????? may_enable: true

??????? actor sys_id: 4a:f5:ee:f2:40:40
??????? actor sys_priority: 65534
??????? actor port_id: 4
??????? actor port_priority: 65535
??????? actor key: 3
??????? actor state: activity aggregation synchronized collecting distributing

??????? partner sys_id: 8a:7b:f0:8b:94:40
??????? partner sys_priority: 65534
??????? partner port_id: 5
??????? partner port_priority: 65535
??????? partner key: 4
??????? partner state: activity aggregation synchronized collecting distributing
---- bond1 ----
??????? status: active negotiated
??????? sys_id: 8a:7b:f0:8b:94:40
??????? sys_priority: 65534
??????? aggregation key: 4
??????? lacp_time: slow

slave: first_if: current attached
??????? port_id: 4
??????? port_priority: 65535
??????? may_enable: true

??????? actor sys_id: 8a:7b:f0:8b:94:40
??????? actor sys_priority: 65534
??????? actor port_id: 4
??????? actor port_priority: 65535
??????? actor key: 4
??????? actor state: activity aggregation synchronized collecting distributing

??????? partner sys_id: 4a:f5:ee:f2:40:40
??????? partner sys_priority: 65534
??????? partner port_id: 3
??????? partner port_priority: 65535
??????? partner key: 3
??????? partner state: activity aggregation synchronized collecting distributing

slave: second_if: current attached
??????? port_id: 5
??????? port_priority: 65535
??????? may_enable: true

??????? actor sys_id: 8a:7b:f0:8b:94:40
??????? actor sys_priority: 65534
??????? actor port_id: 5
??????? actor port_priority: 65535
??????? actor key: 4
??????? actor state: activity aggregation synchronized collecting distributing

??????? partner sys_id: 4a:f5:ee:f2:40:40
??????? partner sys_priority: 65534
??????? partner port_id: 4
??????? partner port_priority: 65535
??????? partner key: 3
??????? partner state: activity aggregation synchronized collecting distributing

默認(rèn)情況下bond_mode是active-backup模式，一開始active的是first_br和first_if

這個(gè)時(shí)候我們從10.10.10.1 ping 10.10.10.3，以及10.10.10.2 ping 10.10.10.4，都是從first_if通過

$ sudo tcpdump? -n -e -i first_if
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on first_if, link-type EN10MB (Ethernet), capture size 65535 bytes
18:58:34.402793 f2:ac:70:72:49:61 > 01:80:c2:00:00:02, ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
18:58:35.403821 ca:d4:fd:47:a6:ce > 01:80:c2:00:00:02, ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
18:59:04.402847 f2:ac:70:72:49:61 > 01:80:c2:00:00:02, ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
18:59:05.403779 ca:d4:fd:47:a6:ce > 01:80:c2:00:00:02, ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
18:59:09.950809 52:54:00:9b:d5:bc > 52:54:00:9b:d5:be, ethertype IPv4 (0x0800), length 98: 10.10.10.1 > 10.10.10.3: ICMP echo request, id 1166, seq 1, length 64
18:59:09.951228 52:54:00:9b:d5:be > 52:54:00:9b:d5:bc, ethertype IPv4 (0x0800), length 98: 10.10.10.3 > 10.10.10.1: ICMP echo reply, id 1166, seq 1, length 64
18:59:33.294940 52:54:00:9b:d5:bd > 52:54:00:9b:d5:bf, ethertype IPv4 (0x0800), length 98: 10.10.10.2 > 10.10.10.4: ICMP echo request, id 1148, seq 1, length 64
18:59:33.295820 52:54:00:9b:d5:bf > 52:54:00:9b:d5:bd, ethertype IPv4 (0x0800), length 98: 10.10.10.4 > 10.10.10.2: ICMP echo reply, id 1148, seq 1, length 64

從上面我們也可以看到LACP包

如果把first_if設(shè)成down，則包的走向會變

sudo ip link set first_if down

我們發(fā)現(xiàn)second_if開始有流量，京first_if變成down，10.10.10.1和10.10.10.2似乎沒有收到影響

$ sudo tcpdump? -n -e -i second_if
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on second_if, link-type EN10MB (Ethernet), capture size 65535 bytes
19:14:34.415216 66:63:74:a9:0e:f2 > 01:80:c2:00:00:02, ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
19:14:35.411181 76:fa:16:61:d7:0e > 01:80:c2:00:00:02, ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
19:16:01.162066 52:54:00:9b:d5:bc > 52:54:00:9b:d5:be, ethertype IPv4 (0x0800), length 98: 10.10.10.1 > 10.10.10.3: ICMP echo request, id 1167, seq 33, length 64
19:16:01.162298 52:54:00:9b:d5:be > 52:54:00:9b:d5:bc, ethertype IPv4 (0x0800), length 98: 10.10.10.3 > 10.10.10.1: ICMP echo reply, id 1167, seq 33, length 64
19:16:01.781051 52:54:00:9b:d5:bd > 52:54:00:9b:d5:bf, ethertype IPv4 (0x0800), length 98: 10.10.10.2 > 10.10.10.4: ICMP echo request, id 1149, seq 29, length 64
19:16:01.781565 52:54:00:9b:d5:bf > 52:54:00:9b:d5:bd, ethertype IPv4 (0x0800), length 98: 10.10.10.4 > 10.10.10.2: ICMP echo reply, id 1149, seq 29, length 64

second_br和second_if變成active

$ sudo ovs-appctl bond/show????
---- bond0 ----
bond_mode: active-backup
bond-hash-basis: 0
updelay: 0 ms
downdelay: 0 ms
lacp_status: negotiated

slave first_br: disabled
??????? may_enable: false

slave second_br: enabled
??????? active slave
??????? may_enable: true

---- bond1 ----
bond_mode: active-backup
bond-hash-basis: 0
updelay: 0 ms
downdelay: 0 ms
lacp_status: negotiated

slave first_if: disabled
??????? may_enable: false

slave second_if: enabled
??????? active slave
??????? may_enable: true

重啟first_if，但是second_br和second_if仍然是active

$ sudo ip link set first_if up

$ sudo ovs-appctl bond/show
---- bond0 ----
bond_mode: active-backup
bond-hash-basis: 0
updelay: 0 ms
downdelay: 0 ms
lacp_status: negotiated

slave first_br: enabled
??????? may_enable: true

slave second_br: enabled
??????? active slave
??????? may_enable: true

---- bond1 ----
bond_mode: active-backup
bond-hash-basis: 0
updelay: 0 ms
downdelay: 0 ms
lacp_status: negotiated

slave first_if: enabled
??????? may_enable: true

slave second_if: enabled
??????? active slave
??????? may_enable: true

如果我們把bond_mode設(shè)為balance

$ sudo ovs-vsctl set Port bond0 bond_mode=balance-slb
$ sudo ovs-vsctl set Port bond1 bond_mode=balance-slb

$ sudo ovs-appctl bond/show
---- bond0 ----
bond_mode: balance-slb
bond-hash-basis: 0
updelay: 0 ms
downdelay: 0 ms
next rebalance: 3412 ms
lacp_status: negotiated

slave first_br: enabled
??????? active slave
??????? may_enable: true

slave second_br: enabled
??????? may_enable: true

---- bond1 ----
bond_mode: balance-slb
bond-hash-basis: 0
updelay: 0 ms
downdelay: 0 ms
next rebalance: 7415 ms
lacp_status: negotiated

slave first_if: enabled
??????? active slave
??????? may_enable: true

slave second_if: enabled
??????? may_enable: true

這個(gè)時(shí)候10.10.10.1 ping 10.10.10.3走first_br

$ sudo tcpdump? -n -e -i first_if
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on first_if, link-type EN10MB (Ethernet), capture size 65535 bytes
19:57:04.093878 ca:d4:fd:47:a6:ce > 01:80:c2:00:00:02, ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
19:57:04.093992 f2:ac:70:72:49:61 > 01:80:c2:00:00:02, ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
19:57:52.559762 52:54:00:9b:d5:bc > 52:54:00:9b:d5:be, ethertype IPv4 (0x0800), length 98: 10.10.10.1 > 10.10.10.3: ICMP echo request, id 1173, seq 22, length 64
19:57:52.560002 52:54:00:9b:d5:be > 52:54:00:9b:d5:bc, ethertype IPv4 (0x0800), length 98: 10.10.10.3 > 10.10.10.1: ICMP echo reply, id 1173, seq 22, length 64
19:57:53.560999 52:54:00:9b:d5:bc > 52:54:00:9b:d5:be, ethertype IPv4 (0x0800), length 98: 10.10.10.1 > 10.10.10.3: ICMP echo request, id 1173, seq 23, length 64
19:57:53.561278 52:54:00:9b:d5:be > 52:54:00:9b:d5:bc, ethertype IPv4 (0x0800), length 98: 10.10.10.3 > 10.10.10.1: ICMP echo reply, id 1173, seq 23, length 64

而10.10.10.2 ping 10.10.10.4走second_br

$ sudo tcpdump? -n -e -i second_if
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on second_if, link-type EN10MB (Ethernet), capture size 65535 bytes
19:57:03.719596 76:fa:16:61:d7:0e > 01:80:c2:00:00:02, ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
19:57:03.723928 66:63:74:a9:0e:f2 > 01:80:c2:00:00:02, ethertype Slow Protocols (0x8809), length 124: LACPv1, length 110
19:57:49.695881 52:54:00:9b:d5:bf > 52:54:00:9b:d5:bd, ethertype IPv4 (0x0800), length 98: 10.10.10.4 > 10.10.10.2: ICMP echo reply, id 1154, seq 13, length 64
19:57:50.697434 52:54:00:9b:d5:bd > 52:54:00:9b:d5:bf, ethertype IPv4 (0x0800), length 98: 10.10.10.2 > 10.10.10.4: ICMP echo request, id 1154, seq 14, length 64
19:57:50.697581 52:54:00:9b:d5:bf > 52:54:00:9b:d5:bd, ethertype IPv4 (0x0800), length 98: 10.10.10.4 > 10.10.10.2: ICMP echo reply, id 1154, seq 14, length 64
19:57:51.699024 52:54:00:9b:d5:bd > 52:54:00:9b:d5:bf, ethertype IPv4 (0x0800), length 98: 10.10.10.2 > 10.10.10.4: ICMP echo request, id 1154, seq 15, length 64

與50位技術(shù)專家面對面20年技術(shù)見證，附贈技術(shù)全景圖

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