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Enabling ATM Cell Mode
When you configure a rate limit profile to account for ATM cell tax, the forwarding
code calculates this information to determine the size of a frame instead of using
only the frame size.
Use the show rate-limit-profile command to display the state of the mode.
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Enabling IP Options Filtering
You can filter packets with IP options on an interface:
When a packet arrives on an interface, the router checks to see if the packet contains
IP options. If it does and if IP options filtering is enabled, that packet is dropped. IP
options filtering is disabled by default.
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this case, if the CLP bit in any cell in the frame has a value of 1, the router treats
the reassembled AAL5 frame as if it also had a CLP value of 1.
Modules on E120 and E320 routers support marking of the ATM CLP bit on
frame-based interfaces. In this case, every cell of the segmented frame leaves
the router with the same CLP value.
Modules on ERX7xx models, ERX14xx models, and the ERX310 Broadband
Services Router support classifying and marking of the ATM CLP bit for individual
ATM cells (AAL0 encapsulation), but not for frame-based interfaces (AAL5
encapsulation).
mark-clp
Issue the atm-cell-mode command to account for the ATM cell tax in statistics
and rate calculations:
host1(config-policy-list)#atm-cell-mode
Monitoring Policy Management Overview on page 181
atm-cell-mode
show rate-limit-profile
Issue the ip filter-options all command.
host1(config-if)#ip filter-options all
Classifier Groups and Policy Rules Overview on page 31
ip filter-options all
Chapter 4: Creating Classifier Groups and Policy Rules
Enabling ATM Cell Mode
39
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