Zesr Overview - Zte ZXR10 2920 User Manual

ZXR10 2920/2928/2952
Disadvantage
of STP
ZESR features
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Access Switch User Manual （Volume I）
zte(cfg)#show sflow
Agent address
Collector address:192.
Ingress:
Reload Mode: Continuous
Sample Mode: All
PortId Port Freq
------ ----------
1 20000
Egress:
Reload Mode: Continuous
PortId Port Freq
------ ----------
2 20000
zte(cfg)#
When counter of port is decreased to 0, data packets coming
into port will be sampled to cpu.
value of counter is 0.

ZESR Overview

There is disadvantage of STP; its convergence speed is slow.
To make up for it, and considering that most of core networks
are annular and each switch has two ports to link into the ring in
this topology structure, so it only needs to block a port in ring
to avoid loop. When link trouble occurs, free the port from
blocked to protect the service flow.
ZTE Ethernet Switching Ring supports fast convergence well
when the topology of ring Ethernet link changes.
master switch in an annular network, and others are transits.
Each switch has two port connected into ring, and one of the
port is designated as primary port,
Master switch sends ring detection frames to detect whether
loop is good. When loop is good,
secondary port.
it turns its secondary port into forwarding state, which ensures
loop to be normal.
Figure 36 shows the typical network of ZESR.
and other switches are transits.
a secondary port in ring.
on master is blocked.
secondary port.
:192. 168. 1.
168. 1.
CPU Freq Counter
---------- ---------
None
CPU Freq Counter
---------- ---------
None
When port does not link up,
When master switch detects that loop is down,
Master has a primary port and
When loop is good, secondary port
When loop is down, master turns on its
1
2
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19998
ZESR is a
other as secondary port.
master switch blocks its
S1 is master,