12-23-2017 12:54 PM - edited 03-05-2019 09:41 AM
Hi,
Subject covers the issues but here is me pinging from a CE > PE and PE > CE. Thought it was an MTU issue but I still get the same amount of loss (around 10%) in the VRF whether MTU is default or 128 and 0 loss from the non-VRF P2P address range. Any advice?
CE-ROUTER1#ping vrf VRF113 172.31.255.14 r 100
Type escape sequence to abort.
Sending 100, 128-byte ICMP Echos to 172.31.255.14, timeout is 2 seconds:
!!!!!!!.!!!!!!!!.!!!!!!!!!!!!!.!!!!!.!!!!!!!!!!.!!!!!!!!!!!.!!!!!!!!!!
!!!.!!!!!!!!!!.!!!!!!!!!!!!.!!
Success rate is 91 percent (91/100), round-trip min/avg/max = 1/2/4 ms
CE-ROUTER1#ping vrf VRF113 172.31.255.14 r 100 df-bit size 128
Type escape sequence to abort.
Sending 100, 128-byte ICMP Echos to 172.31.255.14, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!.!!!!!!!!!!!.!!!!!!!!!!!..!!!!!.!!!!!!!!!!!!.!!!!!!!!!!!!.!!!!!!
!.!!!!!!!!!!!.!!!!!!!!!!!.!!!!
Success rate is 90 percent (90/100), round-trip min/avg/max = 1/1/4 ms
CE-ROUTER1#ping 10.255.255.253 r 1000
Type escape sequence to abort.
Sending 1000, 100-byte ICMP Echos to 10.255.255.253, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (1000/1000), round-trip min/avg/max = 1/2/4 ms
CE-ROUTER1#
------------------------------
PE-ROUTER1#ping vrf VRF113 192.168.100.1 r 100 df-bit size 128
Type escape sequence to abort.
Sending 100, 128-byte ICMP Echos to 192.168.100.1, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!!!!!!.!!!!!!!!!!!.!!!!!!!!!!.!!!!!!!!!!!!.!!!!!!!!!!.!!!!!!!!!!!!
.!!!!!!!!!!!.!!!!!!!!!!.!!!!!!
Success rate is 92 percent (92/100), round-trip min/avg/max = 1/2/4 ms
PE-ROUTER1#ping 10.255.255.254 r 1000
Type escape sequence to abort.
Sending 1000, 100-byte ICMP Echos to 10.255.255.254, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (1000/1000), round-trip min/avg/max = 1/2/4 ms
PE-ROUTER1#
Both routers are LDP speaker.
CE uplink:
interface GigabitEthernet0/0
mtu 1524
ip address 10.255.255.254 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip mtu 1500
ip ospf authentication
ip ospf authentication-key 123
ip ospf network point-to-point
ip ospf dead-interval 5
ip ospf hello-interval 2
ip ospf mtu-ignore
ip ospf cost 5000
duplex auto
speed auto
mpls mtu 1500
mpls label protocol ldp
mpls ip
end
PE downlink:
interface GigabitEthernet0/0/0.104
encapsulation dot1Q 104
ip address 10.255.255.253 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip mtu 1552
ip ospf authentication
ip ospf authentication-key 123
ip ospf network point-to-point
ip ospf dead-interval 5
ip ospf hello-interval 2
ip ospf mtu-ignore
ip ospf cost 5000
mpls mtu 1552
mpls label protocol ldp
mpls ip
end
NB: Actually using public IPs for the P2P just changed to 10.255.255.x for obvious reasons.
12-23-2017 01:46 PM
Hello,
the IP and MPLS MTU sizes of your interfaces are different, is there a specific reason for that ? What if you use the defaults (undo the mtu and mpls mtu commands to enable the defaults, 'no ip mtu', 'no mpls mtu') ?
12-23-2017 02:29 PM
Hey,
I'd been playing around with MTU, they were originally the same. I've just changed them now though for completeness so it's IP/MPLS mtu 1500 on both sides but still loss. You can see I still got the loss when I was pinging with 'df-bit size 128' so it's not an MTU issue (unless MTU needs to be lower than this which it won't be surely).
Pinging from PE to CE with new MTU:
PE-ROUTER1#ping vrf VRF113 192.168.100.1 r 1000 Type escape sequence to abort. Sending 1000, 100-byte ICMP Echos to 192.168.100.1, timeout is 2 seconds: !!!!.!!!!!!!.!!!!.!!!!!!!!!!!!.!!!!!!!!.!!!!!!!!!!!!.!!!!!!.!!!!!!!!!! !!.!!!!!!!!!!!!..!!!!!!!!!!!.!!!.!!!!!!!!!!.!!!!!!!!!!!!.!!!!!!!!!!!!. !!!!!!!!!!!.!!!!.!!!!!!!!!!.!!!!!!!!!!!.!!!!!!!!!!!.!!!!!!!!!!!!.!!!!! !!!!!!!.!!!!!!!!!!!!.!!.!!!!!!!!!!!!.!!!!!!!!!!.!!!!!!!!!!!.!!!!!!!!!! !.!!!!!!!!!!.!!!!!.!!!!!!!!!!!.!!!!!!!.!!!!!!!!!!!.!!!!.!!!!!!!.!!!!!! !.!!!!!!!!!.!!!!!!!!!!!.!!!!!!!!!!!!.!!!!!!!!!!!!.!!!!!!!.!!!!!!!!!!!! .!!!!!!!!!!!.!!!!!!!!!!!.!!!!!!!!!!!!.!!!!!!!!!!!.!!!!!.!.!!!!!!!!!!.! !!!!!!!!!!!.!!!!!!.!!!!!.!!.!!.!!!!!.!!!!.!!!!!!!!.!!!.!!!!..!!!!!!!.! !!!!!!!!!!.!!!!!!!!!.!!!!!!!!!!.!!.!!!!!!!!!.!!!!!!!!!!!.!!!!!!!!!!!.! !!!!!!!!!!.!!!!!!!!!!!!.!!!!!!!!!!!!.!!!!!!!!!!!!.!!!!!!!!!!.!!!!!!!!! .!!!!!!!!!!!.!!!!!!!!!!!!.!!!!!.!!!!!!!!!!!!.!!!!!!!!!!!.!!.!!!!!!!!!! !.!!!!!!!.!!!.!!!!!!!!!!!!.!!!!!!!.!!.!!!!!!!!!!!.!!!!!!!!!.!!!!!!!.!! !!!!!!!!!!.!!!!!!!!!!!!. Success rate is 89 percent (773/864), round-trip min/avg/max = 1/2/16 ms
12-23-2017 03:10 PM
Hello,
can you post the full configs of both routers, PE and CE ? Also, what routing is configured for the vrf ?
12-23-2017 03:53 PM
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