[c-nsp] ISIS BFD not Supported on CRS-3 ?
Amos Thong
amosthy at hotmail.com
Fri Feb 1 13:30:27 EST 2013
Hi C-NSP Members,
We are a service provider running Cisco CRS-3 in our IP/MPLS core. Due to protection, we have recently added another 10Gbps
link connecting 2 Cisco CRS-3 core routers, namely CR-A and CR-B. The config below are on CR-A and CR-B has similar config.
Question :
1. Is this a known issue that BE interface does not support BFD ?
2. Without BFD link failure detection at ISIS level is going to be slower and we perceive that the convergence speed will fall back to ISIS native convergence speed ?
3. Is (2) the worst case and or is there any else that tend to fail ?
We are looking forward to any members who has this environment to share their experience in this area. Thanks.
Regards
Amos
---------------------------------------------
Bundled Ether Config
---------------------------------------------
RP/0/RP0/CPU0:CR-A#sh run int Bundle-Ether 5
Sat Feb 2 01:49:28.043 MYT
interface Bundle-Ether5
description To 10Gbps::CR-B::xe-0/2/0/0
bandwidth 10000000
mtu 9192
service-policy output CORE-QOS-OUTBOUND
ipv4 address 223.28.2.13 255.255.255.252
ipv4 unreachables disable
ipv6 nd suppress-ra
ipv6 address 2001:f40:0:2::d/126
ipv6 unreachables disable
RP/0/RP0/CPU0:CR-A#sh run int Te0/1/0/3
Sat Feb 2 02:05:19.450 MYT
interface TenGigE0/1/0/3
description To 10Gbps::CR-B::Te0/1/0/3
bundle id 5 mode active
!
RP/0/RP0/CPU0:CR-A#sh run int Te0/2/0/0
Sat Feb 2 02:05:29.951 MYT
interface TenGigE0/2/0/0
description To 10Gbps::cR-B::xe-0/2/0/0
bundle id 5 mode active
------------------------------------------
LACP seems to be working
------------------------------------------
RP/0/RP0/CPU0:CR-A#show lacp bundle-ether 5
Sat Feb 2 02:04:53.087 MYT
State: a - Port is marked as Aggregatable.
s - Port is Synchronized with peer.
c - Port is marked as Collecting.
d - Port is marked as Distributing.
A - Device is in Active mode.
F - Device requests PDUs from the peer at fast rate.
D - Port is using default values for partner information.
E - Information about partner has expired.
Bundle-Ether5
Port (rate) State Port ID Key System ID
-------------------- -------- ------------- ------ ------------------------
Local
Te0/1/0/3 30s ascdA--- 0x8000,0x0004 0x0005 0x8000,64-9e-f3-d0-d4-04
Partner 30s ascdA--- 0x8000,0x0002 0x0005 0x8000,44-2b-03-17-89-04
Te0/2/0/0 30s ascdA--- 0x8000,0x0003 0x0005 0x8000,64-9e-f3-d0-d4-04
Partner 30s ascdA--- 0x8000,0x0001 0x0005 0x8000,44-2b-03-17-89-04
Port Receive Period Selection Mux A Churn P Churn
-------------------- ---------- ------ ---------- --------- ------- -------
Local
Te0/1/0/3 Current Slow Selected Distrib None None
Te0/2/0/0 Current Slow Selected Distrib None None
RP/0/RP0/CPU0:CR-A#
----------------------------------------------------------
BFD config in ISIS
----------------------------------------------------------
router isis 1
net 49.0001.2230.2800.0235.00
nsf ietf
log adjacency changes
lsp-gen-interval maximum-wait 5000 initial-wait 50 secondary-wait 100
lsp-refresh-interval 65000
max-lsp-lifetime 65535
lsp-password hmac-md5 encrypted 0212314B1E051D7C4F level 2
address-family ipv4 unicast
metric-style wide
ispf level 1
ispf level 2
mpls traffic-eng level-2-only
mpls traffic-eng router-id Loopback0
spf-interval maximum-wait 5000 initial-wait 50 secondary-wait 100
attached-bit receive ignore
address-family ipv6 unicast
metric-style wide
ispf level 1
ispf level 2
spf-interval maximum-wait 5000 initial-wait 50 secondary-wait 100
attached-bit receive ignore
interface Bundle-Ether5
circuit-type level-2-only
bfd minimum-interval 250 <<<<
bfd multiplier 5 <<<<
bfd fast-detect ipv4 <<<<
point-to-point
hello-padding disable
hello-password hmac-md5 encrypted 03106E1B130C33114D
address-family ipv4 unicast
metric 5000 level 2
!
address-family ipv6 unicast
metric 5000 level 2
--------------------------------------------------------------------------
BFD not working on BE5. Other physical interface BFD sessions are ok.
-------------------------------------------------------------------------
RP/0/RP0/CPU0:CR-A#sh bfd ipv4 session
Sat Feb 2 02:14:13.421 MYT
Interface Dest Addr Local det time(int*mult) State
Echo Async
-------------------- --------------- ---------------- ---------------- ---------
Gi0/0/2/0 223.28.6.37 0s(0s*0) 750ms(250ms*3) UP
Gi0/0/2/0 223.28.6.57 750ms(250ms*3) 6s(2s*3) UP
Gi0/0/2/0 223.28.6.58 750ms(250ms*3) 6s(2s*3) UP
Gi0/0/2/0 223.28.6.61 750ms(250ms*3) 6s(2s*3) UP
Gi0/0/0/0 223.28.6.3 0s(0s*0) 750ms(250ms*3) UP
Gi0/0/0/0 223.28.6.5 0s(0s*0) 750ms(250ms*3) UP
Gi0/0/0/0 223.28.6.24 0s(0s*0) 750ms(250ms*3) UP
Gi0/0/0/0 223.28.6.25 750ms(250ms*3) 6s(2s*3) UP
Gi0/0/0/0 223.28.6.26 750ms(250ms*3) 6s(2s*3) UP
Gi0/0/0/0 223.28.6.29 750ms(250ms*3) 6s(2s*3) UP
Gi0/0/0/4 223.28.3.226 0s(0s*0) 1250ms(250ms*5) UP
Te0/1/0/0 223.28.2.10 1250ms(250ms*5) 10s(2s*5) UP
Te0/1/0/1 223.28.2.2 0s(0s*0) 750ms(250ms*3) UP
Te0/1/0/2 223.28.2.6 0s(0s*0) 1250ms(250ms*5) UP
Te0/2/0/1 223.28.2.50 1250ms(250ms*5) 10s(2s*5) UP
Te0/2/0/2 223.28.2.82 0s(0s*0) 1250ms(250ms*5) UP
BE1 223.28.2.122 n/a n/a DOWN
BE5 223.28.2.14 n/a n/a DOWN <<<<<<<<
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