When checking the interface status on SRX, 800 mbps is seen for GRE interface from "show interfaces":
root@XXXXX> show interfaces gr-0/0/0 extensive Physical interface: gr-0/0/0, Enabled, Physical link is Up Interface index: 145, SNMP ifIndex: 518, Generation: 148 Type: GRE, Link-level type: GRE, MTU: Unlimited, Speed: 800mbps Link flags : Scheduler Keepalives DTE Hold-times : Up 0 ms, Down 0 ms Device flags : Present Running Interface flags: Point-To-Point Statistics last cleared: Never Traffic statistics: Input bytes : 0 0 bps Output bytes : 0 0 bps Input packets: 0 0 pps Output packets: 0 0 pps
800 mbps in " show interface " is not a hard limit. It can be ignored. Check the Input/Output packets pps or bps of each GRE tunnel with " show interface extensive gr-0/0/0 " in gr-0/0/0.x interfaces.
show interface
show interface extensive gr-0/0/0
Logical interface gr-0/0/0.2 (Index 125) (SNMP ifIndex 577) (Generation 190) Flags: Up Point-To-Point SNMP-Traps 0x4000 IP-Header <xx.xx.xx.xx>:<yy.yy.yy.yy>:47:df:64:0000000000000900 Encapsulation: GRE-NULL Copy-tos-to-outer-ip-header: Off Gre keepalives configured: Off, Gre keepalives adjacency state: down Traffic statistics: Input bytes : 99192417476614 Output bytes : 21780945899190 Input packets: 96933370291 Output packets: 66685245887 Local statistics: Input bytes : 61604770 Output bytes : 101688169 Input packets: 886699 Output packets: 1173840 Transit statistics: Input bytes : 99192355871844 117182144 bps Output bytes : 21780844211021 21866560 bps Input packets: 96932483592 14757 pps Output packets: 66684072047 10984 pps
SRX does not have a hard GRE tunnel performance capacity. It depends on the GRE underlying the physical interface, SRX platform, or other features configured which take up CPU time slice.
GRE interface is a logical interface. There is no hard limit on all logical interfaces including GRE.
All logical interfaces that show speed as 800 mbps: