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DES-7200 Configuration Guide Chapter 6 URPF Configuration
6-7
6.3.1 Configure URPF
(global configuration
mode)
After MPLS line cards are inserted into DES-7200 series switches, messages will be
forwarded via MPLS line cards. Please enable URPF function according to the following steps:
Command Function
DES-7200# configure terminal
Enter global configuration mode.
DES-7200(config)# ip verify unicast
source reachable-via rx
Enable URPF function
rx: Use strict mode to perform URPF
check
DES-7200(config)# end
Exit global configuration mode
DES-7200# show ip urpf
Display URPF configurations and statistics
To disable global URPF function, execute "no ip verify" command in the global configuration
mode.
Caution
1. URPF function configured in the global configuration mode is only
valid after MPLS line cards are inserted into DES-7200 series
switches. After URPF function is enabled, URPF check will be
applied to IPv4 messages.
2. URPF function configured in the global configuration mode only
supports strict mode. If used with equal-cost routing, it will switch into
loose mode.
3. URPF function configured in the global configuration mode doesn't
support URPF check with default route.
4. Coexistence of URPF function configured in global configuration
mode and URPF function configured in interface configuration mode
is not supported.
5. Please note that: When DES-7200 series devices are directly
linked to the network segment of user, it is not suggested to use
URPF global configuration. If the directly link user intends to forward
messages via DES-7200 series devices, the URPF check may fail
as DES-7200 series devices haven't got the ARP entries of the
directly link user and valid packets will be discarded.
Configuration example:
# Enable URPF in global configuration mode: