Quality of Service Guide Network QoS Policies
Edition: 01 3HE 11014 AAAC TQZZA 185
ler-use-dscp
Syntax [no] ler-use-dscp
Context config>qos>network>ingress
Description This command is used to override tunnel QoS mapping on all ingress network IP interfaces
that the network-policy-id is associated with. The command may be defined at any time after
the network QoS policy has been created.
For IP traffic riding over MPLS or GRE tunnels that will be routed to the base router, a VRPN
interface, or an IES interface at the tunnel termination point (the eLER), this command makes
it possible for the 7705 SAR to ignore the EXP/DSCP bits in the tunnel header when the
packets arrive at the eLER. This is useful when the mapping for the tunnel QoS marking does
not completely reflect the required QoS handling for the IP routed packet. When the
command is enabled on an ingress network IP interface, the IP interface will ignore the
tunnel’s QoS mapping and will derive the internal forwarding class and associated profile
state based on the DSCP values of the IP header ToS field. This command applies only on
the eLER where the tunnel or service is terminated and the next header in the packet is IP.
The default state is to not enforce customer DSCP at the tunnel-termination point, IP-routed
QoS override within the network QoS policy.
The no form of the command removes use of customer DSCP at tunnel-termination,
IP-routed QoS override from the network QoS policy and all ingress network IP interfaces
associated with the policy.
Default no ler-use-dscp
lsp-exp
Syntax lsp-exp lsp-exp-value fc fc-name profile {in | out}
no lsp-exp lsp-exp-value
Context config>qos>network>ingress
Description This command creates a mapping between the LSP EXP bits of the network ingress traffic
and the forwarding class.
Ingress traffic that matches the specified LSP EXP bits will be assigned to the corresponding
forwarding class. Multiple commands can be entered to define the association of some or all
of the eight LSP EXP bit values with the forwarding class. For undefined values, packets are
assigned to the forwarding class specified under the default-action command.
The no form of this command removes the association of the LSP EXP bit value with the
forwarding class. The default-action then applies to that LSP EXP bit pattern.
Default n/a
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