Huawei quidway s7700 - Page 516

Figure 10-7 Networking diagram for hybrid rings running SEP+RRPP
LSW1 LSW2
LSW3
Block Port
NPE1
NPE2
IP/MPLS Core
A
c
c
e
s
s
SEP
Segment
RRPP
A
g
g
r
e
g
a
t
i
o
n
C
o
r
e
PE1 PE2
PE4
PE3
Primary Edge Node
Secondary Edge Node
VRRP+peer BFD
As shown in Figure 10-7, PE1, PE2 and LSW1 to LSW3 form a SEP segment to access
an RRPP ring. The networking is called hybrid SEP+RRPP ring networking. PE1, PE2
and LSW1 to LSW3 are at the access layer to transparently transmit Layer 2 unicast
and multicast packets. SEP runs at the access layer to implement link redundancy. If
the topology of the SEP segment at the access layer changes, a node in the SEP segment
sends a Flush-FDB packet to instruct the other nodes in the SEP segment to refresh their
MAC forwarding tables and ARP tables. PE1 and PE2 in the SEP segment send TC
packets to notify devices at the upper-layer that the topology of the SEP segment has
changed.
In hybrid SEP+RRPP ring networking, the SEP networks need to report topology
changes to RRPP networks on the edge devices of SEP networks.
NOTE
The basic SEP configurations in the preceding topologies are the same, except for the locations and
configurations of the primary edge interface, no-neighbor primary edge interface, secondary edge interface,
and no-neighbor secondary edge interface. For details about these interfaces, see Table 10-2.
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 10 SEP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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