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Cisco SCE 8000 CLI Command Reference
Chapter 2 CLI Command Reference
asymmetric-l2-support
asymmetric-l2-support
Configures the system to treat flows as having asymmetric Layer 2 characteristics (including Ethernet,
VLAN, and L2TP), for the purpose of packet injection.
To disable asymmetric L2 support, use the no form of this command.
asymmetric-l2-support
no asymmetric-l2-support
Syntax Description This command has no arguments or keywords.
Command Default Asymmetric Layer 2 support is disabled.
Command Modes Interface Linecard Configuration
Command History This table includes the following release-specific history entries:
Usage Guidelines You should enable asymmetric Layer 2 support when the following conditions apply for any flows:
• Each direction of the flow has a different pair of MAC addresses.
• The routers do not accept packets with the MAC address of the other link.
Note “Asymmetric routing topology” support and “asymmetric tunneling support” are two separate features.
Asymmetric routing topology refers to topologies where the Cisco SCE platform might see some flows
only in one direction (upstream or downstream).
Asymmetric tunneling support (asymmetric L2 support) refers to the ability to support topologies where
the Cisco SCE platform sees both directions of all flows, but some of the flows may have different Layer
2 characteristics (such as MAC addresses, VLAN tags, and L2TP headers), which the Cisco SCE
platform must specifically take into account when injecting packets into the traffic (such as in block and
redirect operations).
Note as well that, to support asymmetric Layer 2, the Cisco SCE platform switches to asymmetric flow
open mode, which impacts performance. This limitation is not the case for asymmetric routing topology.
Authorization: admin
Release Modification
3.1.6 This command was introduced.
- Cisco Systems, Inc 1
- CONTENTS 3
- Contents 10
- About This Guide 19
- Document Revision History 20
- Organization 20
- Related Publications 20
- Conventions 21
- Command-Line Interface 23
- CLI Authorization Levels 24
- CLI Command Mode Hierarchy 25
- • E1: interface Linecard 0 27
- • E3: (traffic ports) 27
- Prompt Indications 28
- Example: 29
- CLI Help Features 31
- Argument Help 32
- Command History 34
- Keyboard Shortcuts 34
- Auto-Completion 35
- FTP User Name and Password 36
- Managing Command Output 37
- Creating a CLI Script 39
- CLI Command Reference 41
- • 0 (user) 43
- • 5 (viewer) 43
- • 10 (admin) 43
- • 15 (root) 43
- • none—Use no authentication 48
- EXAMPLE 1 54
- EXAMPLE 2 54
- • Permit/deny field 56
- • attack-detector 62
- • access-list 62
- • Action—report 63
- command to disable it 95
- is 60 minutes 123
- General Guidelines 124
- Recurring Configurations 124
- Specifying Explicit Days 125
- Example 1 125
- Example 2 125
- Example 3 125
- • /system/preconf 143
- • /system/prevconf 144
- Disable multi-mapping: 163
- Load Balancing 176
- High Availability (Failover) 176
- Figure 2-1 Disable Command 181
- • full—Full duplex 183
- • half—Half duplex 183
- Figure 2-2 Enable Command 185
- • Must begin with a letter 186
- • Cannot contain spaces 186
- • Are case-sensitive 186
- • General configuration files 190
- • Static party DB files 190
- • start—Starts recording 195
- • stop—Stops recording 195
- Command Description 206
- EXEC authorization level 214
- • global-controller bandwidth 222
- • global-controller name 222
- EXAMPLE 1: 249
- EXAMPLE 2: 249
- Ipv6-IANA 271
- • warning 292
- • Adding an entry 297
- • Removing an entry 297
- • traffic-engineering skip 327
- • vpn skip 327
- • END_USER_E164 343
- • END_USER_IMSI 343
- • END_USER_NAI 343
- • END_USER_SIP-URI 343
- • END_USER_PRIVATE 343
- • Link Usage RDRs (LURs) 353
- • Package Usage RDRs (PURs) 353
- • Category 1—40 MB 364
- • Category 2—24 MB 364
- • Category 3—8 MB 364
- • Category 4—8 MB 364
- Priorities 369
- Table 2-8 Valid Mode Settings 373
- • The host ends with .com 384
- User Authorization Guidelines 390
- • Calling station ID 401
- • NAS port 401
- • Username 401
- • CDP mode 422
- Counter Definitions 514
- Current values: 514
- Peak values: 514
- Event counters: 515
- • Has no mapping 517
- Examples Example 1 521
- Example 4 522
- TP-IP-range 533
- EXAMPLE 3 542
- EXAMPLE 4 542
- • duplex 550
- • IP address 550
- • auto-fail-over 550
- • Quota rate control 574
- • Maximum size of the buffer 574
- SCE8000> 597
- • Main connection 602
- SCE8000(config)#> 678
- • SNMP traps 683
- • Enterprise traps 683
- Authorization: admin 686
- Examples 686
- IP specification 740
- Port specification 741
- Tunnel ID specification 741
- Traffic counter name 741
- • Action = flow-capture 743
- IP Specification 744
- Limitations 747
- • Link-0 757
- • Link-1 757
- • VAS server is enabled 759
- • Server has a VLAN tag 759
- • Server Group ID 764
- • SCE 8000: 0-63 764
- Direction 771
- PIR Values 772
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