It's GRE. this are the configs of the tunnel and hssi interfaces:
interface Tunnel0
description GRE-tunnel0-2
bandwidth 34816
ip address a.b.c.d 255.255.255.252
ip tcp adjust-mss 1436
load-interval 30
keepalive 10 3
tunnel source Loopback5
tunnel destination e.f.g.h
hold-queue 4096 in
hold-queue 4096 out
end
interface Hssi4/0
dampening 30 1000 2000 60
description p2p
bandwidth 34816
ip address i.j.k.l 255.255.255.252
ip access-group egress in
no ip unreachables
no ip proxy-arp
encapsulation ppp
ip route-cache flow
load-interval 30
no peer neighbor-route
hssi external-loopback-request
serial restart-delay 0
no cdp enable
end
These are the resluts from show interface commands:
R1#show interfaces tunnel 0
Tunnel0 is up, line protocol is up
Hardware is Tunnel
Description: GRE-tunnel0-2
Internet address is a.b.c.d/30
MTU 1514 bytes, BW 34816 Kbit, DLY 500000 usec,
reliability 255/255, txload 4/255, rxload 3/255
Encapsulation TUNNEL, loopback not set
Keepalive set (10 sec), retries 3
Tunnel source 1.2.3.4 (Loopback5), destination e.f.g.h
Tunnel protocol/transport GRE/IP, key disabled, sequencing disabled
Tunnel TTL 255
Checksumming of packets disabled, fast tunneling enabled
Tunnel transmit bandwidth 8000 (kbps)
Tunnel receive bandwidth 8000 (kbps)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/4096/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/4096 (size/max)
30 second input rate 486000 bits/sec, 117 packets/sec
30 second output rate 585000 bits/sec, 120 packets/sec
9782494 packets input, 488630909 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
18012002 packets output, 1635080853 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
R1#show interfaces hssi 4/0
Hssi4/0 is up, line protocol is up
Hardware is M1T-HSSI-B
Description: p2p
Internet address is i.j.k.l/30
MTU 4470 bytes, BW 34816 Kbit, DLY 200 usec,
reliability 255/255, txload 31/255, rxload 126/255
Encapsulation PPP, LCP Open
Open: IPCP, crc 16, loopback not set
Keepalive set (10 sec)
Restart-Delay is 0 secs
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 2d10h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 3338
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 17318000 bits/sec, 3136 packets/sec
30 second output rate 4283000 bits/sec, 2797 packets/sec
281998575 packets input, 95062960 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 parity
275 input errors, 254 CRC, 0 frame, 16 overrun, 0 ignored, 5 abort
508278019 packets output, 2316043821 bytes, 0 underruns
0 output errors, 0 applique, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
2 carrier transitions LC=down CA=up TM=down LB=down TA=up LA=down
It's the same router. If we do a tunnel "over" hssi interface throughput goes only up to 200-400 kbps. If we do it "over" the Fast Ethernet interface from one PC we can get 2Mbps with no problems.
Other indications are that through tunnel over hssi we can not open certain sites, like hotmail etc. Cisco site works just fine, although we can not watch the videos, we presume because of the low throughput.
thanks
