Limitations and Restrictions
Following are the limitations and restrictions for this feature:
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The feature does not support modification of application ToS.
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If the reordering of packets occurs in an SA, the receiver may discard packets because of anti replay mechanism.
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IPv4 traffic cannot pass through the IPv6 tunnels as this configuration is not allowed. However, IPv4 and IPv6 traffic need IPv4 and IPv6 tunnels respectively.