Configuration Limitations
Some GRE tunneling features are not currently available on ACX Series routers. Be aware
of the following limitations when you are configuring GRE on an ACX router:
•
Unsupported features—GRE on the ACX routers does not support the following features:
•
Virtual routing over GRE
•
Bidirectional Forwarding Detection (BFD) protocol over GRE distributed mode
•
MPLS over GRE tunnels
•
GRE keepalives
•
GRE keys, payload packet fragmentation, and sequence numbers for fragmented
packets
•
BGP dynamic tunnels
•
RFC 1701 and RFC 1702
•
RFC 2890—Key and sequence number extensions to GRE
•
IPv6 as delivery header
•
GRE path MTU discovery
•
Load balancing when NNI is ECMP
•
Interface statistics on GRE interfaces
•
Class of service and firewall on GRE tunnel
•
Routing Protocol—ACX routers do not support routing protocols on GRE interfaces.
You need to disable routing on GRE interfaces under the [edit protocols] hierarchy. For
example,
[edit]
user@host# show protocols
ospf {
area 0.0.0.0 {
interface all;
interface gr-0/0/10.0 {
disable;
}
}
}
NOTE: This limitation is applicable for all routing protocols (such as OSPF,
ISIS).
Related
Documentation
Configuring Generic Routing Encapsulation Tunneling on ACX Series on page 584•
• Configuring Unicast Tunnels on page 585
583Copyright © 2017, Juniper Networks, Inc.
Chapter 19: Configuring Generic Routing Encapsulation
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