Auto-Negotiation
→ 10M Ethernet compatible with the 100M Ethernet. Full duplex ↔
Half duplex.
→ Priority
(Precedence) : 100BaseTX full duplex → T4 → TX → 10BaseT full
duplex → 10BaseT
→
[Quidway-Ethernet0/1]
duplex { auto | full | half } \\ or undo duplex
→
[Quidway-Ethernet0/1]
duplex { auto | 10 | 100 } \\ or undo speed
Flow Control
→ { half-duplex: backpressure, full-duplex: PAUSE frame (802.3x) }
Port Aggregation
Advantages :
→ Increase link
bandwidth
→ Traffic
load-balance
→ Improve
reliability : the members in the same group backup for each other
Limitation for port
aggregation between two peers :
→ Number of the
aggregation ports [physical params]
→ Speed of the
aggregation ports [ … ]
→ Duplex mode
of the aggregation ports [ … ]
→ The basic
configuration must be same [logical params]
→ STP :
enable/disable, port link-type (PPP/not), pref level, route cost,
speed limit for sending packets, loop protection, root
protection, and edge port.
→ QoS : flow
speed control, preference mark, default pref level of 802.1p,
bandwidth guarantee, congestion prevention, flow redirection,
and flow statistics.
→ VLAN : VLANs
that are allowed to pass the port and default VLAN ID
→ Port : port
link-type { trunk | hybrid | access }
Example:
<Picture 1>
Port Mirroring
→ Port-based : it
copies the sending and receiving data traffic from multiple ports to
one monitor port.
→ Flow-based :
only applied to flows that meet requirements, which may include the
same destination address, the same port number, and so on. Only one
port can be configured on switches.
Example:
[SW1] E0/1 ––––
E0/1 [SW2] E0/24 –––– PC
[SW1]interface
Vlanif 1
[]ip address
10.1.1.1 30
[SW2]interface
Vlanif 1
[]ip address
10.1.1.2 30
[]acl number 200
[ ]rule permit
ingress interface e0/1
[]mirrored-to
link-group 200 interface Ethernet 0/24
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