Virtual Private Routed Network Services
7750 SR OS Services Guide Page 1013
destination host. When both the destination and source hosts from the ARP request are
known on the SAP and the subscriber identifications do not match, the ARP request may be
forwarded to the rest of the VPRN destinations.
If the static subscriber host’s sub-ident string is not defined, the host is not considered to
belong to the same subscriber as another host on the SAP.
If source or destination host is unknown, the hosts are not considered to belong to the same
subscriber. ARP messages from unknown hosts are subject to anti-spoof filtering rules
applied at the SAP.
If sub-ident is not enabled on the SAP arp-reply-agent, subscriber identification matching is
not performed on ARP requests received on the SAP.
ARP requests are never forwarded back to the same SAP or within the receiving SAP’s Split
Horizon Group.
sub-profile sub-profile-name — Specify this optional parameter to specify an existing subscriber
profile name to be associated with the static subscriber host. The subscriber profile is configured
in the config>subscr-mgmt>sub-profile context.
sla-profile sla-profile-name — Specify this optional parameter to specify an existing SLA profile
name to be associated with the static subscriber host. The SLA profile is configured in the
config>subscr-mgmt>sla-profile context.
host
Syntax host {[ip ip-address] [mac mac-address]}[subscriber sub-ident-string] [sub-profile sub-
profile-name] [sla-profile sla-profile-name] [ancp-string ancp-string]
no host {[ip ip-address] [mac ieee-address]}
no host all
Context config>service>vprn>if>sap
config>service>vprn>sub-if>grp-if>sap
Description This command creates a static subscriber host for the SAP. Static subscriber hosts may be used by the
system for various purposes. Applications within the system that make use of static host entries
include anti-spoof, ARP reply agent and source MAC population into the VPRN forwarding
database.
Multiple static hosts may be defined on the SAP. Each host is identified by either a source IP address,
a source MAC address or both a source IP and source MAC address. Every static host definition must
have at least one address defined, IP or MAC.
Static hosts can exist on the SAP even with anti-spoof and ARP reply agent features disabled. When
enabled, each feature has different requirements for static hosts.
Use the no form of the command to remove a static entry from the system. The specified ip-address
and mac-address must match the host’s exact IP and MAC addresses as defined when it was created.
When a static host is removed from the SAP, the corresponding anti-spoof filter entry and/or FDB
entry is also removed.
Default none
Parameters ip ip-address — Specify this optional parameter when defining a static host. The IP address must be
specified for anti-spoof ip and anti-spoof ip-mac and arp-reply-agent. Only one static host
may be configured on the SAP with a given IP address.
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