Enterprise QoS Solution Reference Network Design Guide

Chapter 3 WAN Aggregator QoS Design
Verification Command: show atm bundle
Version 3.3
WAN Edge Link-Specific QoS Design
The show atm bundle command provides details on the configured and current admission criteria for
individual ATM PVCs. In Example 3-29, PVC 0/600 (the voice PVC) accepts only traffic that has been
marked to IPP 5 (voice). All other IPP values (0 to 4 and 6 to 7) are assigned to PVC 0/60 (the data PVC).
This command also shows the activity for each PVC.
Example 3-29 show atm bundle Verification of ATM PVC Bundle Definitions and Activity
WAN-AGG-7200#show atm bundle
BRANCH#60 on ATM3/0.60: UP
Config Current Bumping PG/ Peak Avg/Min Burst
VC Name VPI/ VCI Prec/Exp Prec/Exp PrecExp/ PV Kbps kbps Cells Sts
Accept
BRANCH60-DATA 0/60 7-6, 4-0 7-6, 4-0 - / Yes - 512 512 1145 UP
BRANCH60-VOICE 0/600 5 5 - / No PV 256 256 94 UP
WAN-AGG-7200#
Medium-Speed (£ T1/E1) ATM Links
Recommendation: Use ATM inverse multiplexing over ATM (IMA) to keep future expansion easy to
manage. No LFI is required. cRTP is optional.
ATM IMA is a natural choice for medium-speed ATM links, as shown in Figure 3-16. Although the
inverse-multiplexing capabilities are not used at these speeds, IMA interfaces make future expansion to
high-speed links easy to manage (as will be demonstrated between Example 3-30 and the high-speed
ATM link in Example 3-35).
Figure 3-16 Medium-Speed ATM Links
WAN Aggregator
ATM T1/E1 IMA Link
(Only One Group Member Is Active)
ATM
Cloud
Example 3-30 Medium-Speed (T1/E1) ATM IMA QoS Design Example
!
interface ATM3/0
no ip address
no atm ilmi-keepalive
ima-group 0 ! ATM3/0 added to ATM IMA group 0
no scrambling-payload
!
…
!
interface ATM3/IMA0
no ip address
no atm ilmi-keepalive
!
interface ATM3/IMA0.12 point-to-point
ip address 10.200.60.1 255.255.255.252
Branch Router
Enterprise QoS Solution Reference Network Design Guide
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