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Cisco Bug: CSCua99035 - "mls mpls tunnel-recir" blocking IPv6 tunnel scale

Last Modified

Feb 07, 2017

Products (1)

  • Cisco 7600 Series Routers

Known Affected Releases


Description (partial)

Symptoms: When enabling the "mls mpls tunnel-recir", the Tunnel Reserved VLAN 
6RD tunnel is allocated. If there is a Tunnel Reserved VLAN, then an extra VPN 
is allocated. VPN space will be exceeded when you scale up the 6RD tunnel, and 
you will notice VPNMAP-SP-2-SPACE_EXCEEDED messages. You can  verify the output 
of the VPN table.
RTHS_UUT_PE1-sp#sh platform software vpn status
 Exceeded Space: 998  ----------------------------------------> exceeded the 
VPN Space
Entries reserved for 6VPE:  255 
Entries used by 6VPE:       255 ---------------------------------> We have 253 
IPv6 VRF, but it is showing more than configured VRF.
Entries free on 6VPE:       0
Entries used by no-v6 VRFs: 500
Entries used by MLS applic: 3
Entries free for all no-v6: 3337
Conditions: This symptom is observed under the following conditions:

1) Configure the "mls mpls tunnel-recir" on the router along with the 6RD 
Tunnel configuration.
2) When you insert ES-20 into the existing system, "mls mpls tunnel-recir"   
will be configured by default.
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Bug Details Include

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  • Status
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