Patent ID: 11888734
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A Multiprotocol Label Switching (MPLS) network comprising:
a plurality of extension header (EH) capable Label Switching Routers (LSRs);
at least one EH non-capable LSR coupled to the plurality of EH capable LSRs;
a first EH capable LSR configured to:
receive an advertisement message indicating whether a downstream LSR is EH capable;

receive a packet to be transmitted to the downstream LSR;
determine whether the packet includes one or more extension headers (EHs); and
insert an EH label into an MPLS label stack of the packet after determining advertised capabilities of the downstream LSR indicate that the downstream LSR is EH capable and the packet does not include the one or more EHs.