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222 Chapter 8: Using DSL to Access a Central Site

Example 8-49 illustrates that both subinterfaces are in the same bridge group (Bridge group 1),

and trafﬁc is passed among them. show bridge is another useful command to debug RFC 1483

bridging.

Summary

This chapter covered ADSL technology, Cisco DSL hardware components, and the

conﬁguration of various DSL access architectures, such as IRB, RBE, PPPoA, and PPPoE. Keep

in mind that each DSL access architecture has its advantages and disadvantages. You should

further research these architectures to discover the best implementation for your DSL network

environment.

Table 8-3 summarizes the commands used in this chapter.

Example 8-48 Displaying ARP Information

lab-6400NRP#show arp

Protocol Address Age (min) Hardware Addr Type Interface

Internet 10.2.2.2 31 0001.96a4.84ac ARPA BVI1

Internet 10.2.2.3 31 0001.96a4.8fae ARPA BVI1

Internet 10.2.2.1 - 0050.7359.35a6 ARPA BVI1

Example 8-49 Displaying Classes of Entries in the Bridge Forwarding Database

lab-6400NRP#show bridge verbose

Total of 300 station blocks, 298 free

Codes: P - permanent, S - self

BG Hash Address Action Interface VC Age RX count TX count

1 21/0 0001.96a4.8fae forward ATM0/0/0.235 2 0 5 5

1 28/0 0001.96a4.84ac forward ATM0/0/0.135 1 0 100 100

Flood ports (BG 1) RX count TX count

ATM0/0/0.135 0 0

ATM0/0/0.235 0 0

Table 8-3 Summary of Commands Used in This Chapter

Command Description

slot slot# cardtype Conﬁgures a slot for a speciﬁc card type.

dsl-proﬁle proﬁle-name Creates a DSL proﬁle.

dmt bitrate max interleaved downstream

dmt-bitrate upstream dmt-bitrate

Sets the maximum and minimum allowed bit

rates for the fast-path and interleaved-path

proﬁle parameters.

dmt margin downstream dmt-margin

upstream dmt-margin

Sets the upstream and downstream SNR DMT

margins.

dmt check-bytes interleaved downstream

bytes upstream bytes

Sets the upstream and downstream check bytes.

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