04-28-2008 03:54 AM - edited 03-03-2019 09:43 PM
I have 2 3825 routers and have configured GRE+ EIGRP. I have 2 tunnels one going to loctnA and the other to loctnB. The GRE tunnel to loctnA is pefect. There is a lot of latency on the loctnB GRE tunnel. The end to end ping to the physical interace results in a avg latency of 4 msec, whereas ping to the tunnel interface reseults on 110 msec.
Any leads?
-Sai.
04-28-2008 04:03 AM
HI Sai, [Pls Rate if HELPS]
What is the "Tunnel Mode" configured on the Tunnel Interface.
If Tunnel Mode as "ipip" is configured means, remove the same and try. I have experienced the smiliar issue and after doing a same it worked properly.
Also, redo the configuration of EIGRP on either side for Location B. This will something look like a propability try but have experienced several such cases with EIGRP and after redo of config it has worked.
Pls Rate if HELPS
Best Regards,
Guru Prasad R
04-28-2008 04:27 AM
Hi Guru,
everyting is default there is no ipip configured.
04-28-2008 04:43 AM
Please post the relevant portion of the config.
__
Edison.
04-28-2008 05:03 AM
Tunnel1 is having the issue.
interface Tunnel0
bandwidth 6000
ip address 10.254.82.70 255.255.255.252
ip mtu 1420
ip tcp adjust-mss 1380
load-interval 30
delay 1
keepalive 10 3
tunnel source 10.254.82.126
tunnel destination 10.254.82.66
!
interface Tunnel1
bandwidth 6000
ip address 10.254.83.1 255.255.255.252
ip tcp adjust-mss 1380
load-interval 30
delay 1
qos pre-classify
keepalive 10 3
tunnel source 10.254.82.58
tunnel destination 10.254.82.57
!
!
interface FastEthernet1/0
ip address 10.254.82.126 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip accounting output-packets
ip flow ingress
ip flow egress
ip route-cache flow
no ip mroute-cache
load-interval 30
duplex full
speed 100
no cdp enable
!
interface FastEthernet1/1
bandwidth 6000
ip address 10.254.82.58 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
no ip mroute-cache
delay 1
duplex full
speed 100
no cdp enable
!
router eigrp
redistribute static
network 10.30.1.0 0.0.0.255
network 10.254.82.60 0.0.0.3
network 10.254.82.68 0.0.0.3
network 10.254.83.0 0.0.0.3
no auto-summary
!
router bgp
no synchronization
bgp log-neighbor-changes
neighbor 10.254.82.125 remote-as
no auto-summary
!
ip classless
ip route 10.30.0.0 255.255.0.0 10.30.1.254
ip route 10.108.32.0 255.255.240.0 10.30.1.254
ip route 10.254.32.176 255.255.255.240 10.30.1.254
ip route 172.21.167.0 255.255.255.0 10.30.1.254
04-28-2008 06:20 AM
MTU mismatch may cause the issue since it will cause many more traffic fragmentations.
I saw you have "ip mtu 1420" setup in Tunnel0 why not in Tunnel1? Any history reason?
I would suggest to configure same in Tunnel1 and give it try.
Or, use 'tunnel path-mtu-discovery' in Tunnel1 for its to do automatically detect proper MTU for end-2-end trffic flow.
Please let me know the result and rate it.
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