blob: 26e67690bc2b81b67b79d42400a9272a14843dcc (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
.. _bridge-interface:
######
Bridge
######
A Bridge is a way to connect two Ethernet segments together in a
protocol independent way. Packets are forwarded based on Ethernet
address, rather than IP address (like a router). Since forwarding is
done at Layer 2, all protocols can go transparently through a bridge.
The Linux bridge code implements a subset of the ANSI/IEEE 802.1d
standard.
.. note:: Spanning Tree Protocol is not enabled by default in VyOS.
:ref:`stp` can be easily enabled if needed.
Configuration
#############
Address
-------
.. cmdinclude:: ../_include/interface-address.txt
:var0: bridge
:var1: br0
.. cfgcmd:: set interfaces bridge <interface> ipv6 address autoconf
.. include:: common-ipv6-addr-autoconf.txt
.. cfgcmd:: set interfaces bridge <interface> ipv6 address eui64
<prefix>
:abbr:`EUI-64 (64-Bit Extended Unique Identifier)` as specified in
:rfc:`4291` allows a host to assign iteslf a unique 64-Bit IPv6
address.
.. code-block:: none
set interfaces bridge br0 ipv6 address eui64 2001:db8:beef::/64
.. cfgcmd:: set interfaces bridge <interface> aging <time>
MAC address aging `<time`> in seconds (default: 300).
.. cfgcmd:: set interfaces bridge <interface> max-age <time>
Bridge maximum aging `<time>` in seconds (default: 20).
If a another bridge in the spanning tree does not send out a hello
packet for a long period of time, it is assumed to be dead.
Link Administration
-------------------
.. cfgcmd:: set interfaces bridge <interface> description <description>
Assign given `<description>` to interface. Description will also be
passed to SNMP monitoring systems.
.. cfgcmd:: set interfaces bridge <interface> disable
Disable given `<interface>`. It will be placed in administratively
down (``A/D``) state.
.. cfgcmd:: set interfaces bridge <interface> disable-flow-control
Disable Ethernet flow control (pause frames).
.. cfgcmd:: set interfaces bridge <interface> mac <mac-address>
Configure user defined :abbr:`MAC (Media Access Control)` address on
given `<interface>`.
.. cfgcmd:: set interfaces bridge <interface> igmp querier
Enable IGMP querier
Member Interfaces
-----------------
.. cfgcmd:: set interfaces bridge <interface> member interface <member>
Assign `<member>` interface to bridge `<interface>`. A completion
helper will help you with all allowed interfaces which can be
bridged. This includes :ref:`ethernet-interface`,
:ref:`bond-interface`, :ref:`l2tpv3-interface`, :ref:`openvpn`,
:ref:`vxlan-interface`, :ref:`wireless-interface`,
:ref:`tunnel-interface` and :ref:`geneve-interface`.
.. cfgcmd:: set interfaces bridge <interface> member interface <member>
priority <priority>
Configure individual bridge port `<priority>`.
Each bridge has a relative priority and cost. Each interface is
associated with a port (number) in the STP code. Each has a priority
and a cost, that is used to decide which is the shortest path to
forward a packet. The lowest cost path is always used unless the
other path is down. If you have multiple bridges and interfaces then
you may need to adjust the priorities to achieve optimium
performance.
.. cfgcmd:: set interfaces bridge <interface> member interface <member>
cost <cost>
Path `<cost>` value for Spanning Tree Protocol. Each interface in a
bridge could have a different speed and this value is used when
deciding which link to use. Faster interfaces should have lower
costs.
.. _stp:
STP Parameter
-------------
:abbr:`STP (Spanning Tree Protocol)` is a network protocol that builds a
loop-free logical topology for Ethernet networks. The basic function of
STP is to prevent bridge loops and the broadcast radiation that results
from them. Spanning tree also allows a network design to include backup
links providing fault tolerance if an active link fails.
.. cfgcmd:: set interfaces bridge <interface> stp
Enable spanning tree protocol. STP is disabled by default.
.. cfgcmd:: set interfaces bridge <interface> forwarding-delay <delay>
Spanning Tree Protocol forwarding `<delay>` in seconds (default: 15).
Forwarding delay time is the time spent in each of the Listening and
Learning states before the Forwarding state is entered. This delay is
so that when a new bridge comes onto a busy network it looks at some
traffic before participating.
.. cfgcmd:: set interfaces bridge <interface> hello-time <interval>
Spanning Tree Protocol hello advertisement `<interval>` in seconds
(default: 2).
Periodically, a hello packet is sent out by the Root Bridge and the
Designated Bridges. Hello packets are used to communicate information
about the topology throughout the entire Bridged Local Area Network.
Example
-------
Creating a bridge interface is very simple. In this example we will
have:
* A bridge named `br100`
* Member interfaces `eth1` and VLAN 10 on interface `eth2`
* Enable STP
* Bridge answers on IP address 192.0.2.1/24 and 2001:db8::ffff/64
.. code-block:: none
set interfaces bridge br100 address 192.0.2.1/24
set interfaces bridge br100 address 2001:db8::ffff/64
set interfaces bridge br100 member interface eth1
set interfaces bridge br100 member interface eth2.10
set interfaces bridge br100 stp
This results in the active configuration:
.. code-block:: none
vyos@vyos# show interfaces bridge br100
address 192.0.2.1/24
address 2001:db8::ffff/64
member {
interface eth1 {
}
interface eth2.10 {
}
}
stp
Operation
=========
.. opcmd:: show bridge
The `show bridge` operational command can be used to display
configured bridges:
.. code-block:: none
vyos@vyos:~$ show bridge
bridge name bridge id STP enabled interfaces
br100 8000.0050569d11df yes eth1
eth2.10
.. opcmd:: show bridge <name> spanning-tree
Show bridge `<name>` STP configuration.
.. code-block:: none
vyos@vyos:~$ show bridge br100 spanning-tree
br100
bridge id 8000.0050569d11df
designated root 8000.0050569d11df
root port 0 path cost 0
max age 20.00 bridge max age 20.00
hello time 2.00 bridge hello time 2.00
forward delay 14.00 bridge forward delay 14.00
ageing time 300.00
hello timer 0.06 tcn timer 0.00
topology change timer 0.00 gc timer 242.02
flags
eth1 (1)
port id 8001 state disabled
designated root 8000.0050569d11df path cost 100
designated bridge 8000.0050569d11df message age timer 0.00
designated port 8001 forward delay timer 0.00
designated cost 0 hold timer 0.00
flags
eth2.10 (2)
port id 8002 state disabled
designated root 8000.0050569d11df path cost 100
designated bridge 8000.0050569d11df message age timer 0.00
designated port 8002 forward delay timer 0.00
designated cost 0 hold timer 0.00
.. opcmd: show bridge <name> macs
Show bridge Media Access Control (MAC) address table
.. code-block:: none
vyos@vyos:~$ show bridge br100 macs
port no mac addr is local? ageing timer
1 00:53:29:44:3b:19 yes 0.00
|
