Create Date: Apr 15 2013 9:12PM
Hello,
Have problem with unfeasible routes if next-hop was learn OSPF (XOS 15.2.2.7)
# sh bgp routes network 10.33.33.0/24
Routes:
Destination Peer Next-Hop LPref Weight MED AS-Path
----------------------------------------------------------------------------------------
u i 10.33.33.0/24 82.144.193.144 82.144.195.142 140 1 0 42982
u i 10.33.33.0/24 82.144.193.150 82.144.195.142 140 1 0 42982
u i 10.33.33.0/24 82.144.193.145 82.144.195.142 140 1 0 42982
u i 10.33.33.0/24 82.144.193.151 82.144.195.142 140 1 0 42982
Flags: (*) Preferred BGP route, (>) Active, (d) Suppressed, (h) History
(s) Stale, (m) Multipath, (u) Unfeasible
Origin: (?) Incomplete, (e) EGP, (i) IGP
BGP Route Statistics Matching the Display Criteria
Feasible Routes : 0
Active Routes : 0
Rejected Routes : 0
Unfeasible Routes : 4
Next-hop at rib & reachable:
# rtlookup 82.144.195.142
Ori Destination Gateway Mtr Flags VLAN Duration
#o1 82.144.195.140/30 77.120.1.62 22 UG-D---um--f- vlan187 0d:1h:34m:42s
in KB I'm find next info
Goal: What makes BGP routes show as Unfeasible under the 'show bgp route all' command?
Why: Two reasons cause such behavior:
- Local VLAN is not ipforwading enabled (as below example).
- Route's next-hop is unreachable.
But
Local vlan ip forwarding:
# sh vlan vlan186
VLAN Interface with name vlan186 created by user
Admin State: Enabled Tagging: 802.1Q Tag 186
Description: agg-1.f17 - cr-1.f17
Virtual router: VR-Default
IPv4 Forwarding: Enabled
Primary IP : 77.120.1.53/30
IPv6 Forwarding: Disabled
IPv6: None
STPD: None
Protocol: Match all unfiltered protocols
Loopback: Disabled
NetLogin: Disabled
QosProfile: None configured
Egress Rate Limit Designated Port: None configured
Flood Rate Limit QosProfile: None configured
Ports: 1. (Number of active ports=1)
Tag: *1g
Flags: (*) Active, (!) Disabled, (g) Load Sharing port
(b) Port blocked on the vlan, (m) Mac-Based port
(a) Egress traffic allowed for NetLogin
(u) Egress traffic unallowed for NetLogin
(t) Translate VLAN tag for Private-VLAN
(s) Private-VLAN System Port, (L) Loopback port
(x) VMAN Tag Translated port
Next-hop reachable:
# rtlookup 82.144.195.142
Ori Destination Gateway Mtr Flags VLAN Duration
#o1 82.144.195.140/30 77.120.1.62 22 UG-D---um--f- vlan187 0d:3h:58m:52s
# ping coun 3 82.144.195.142
Ping(ICMP) 82.144.195.142: 3 packets, 8 data bytes, interval 1 second(s).
16 bytes from 82.144.195.142: icmp_seq=0 ttl=63 time=24 ms
16 bytes from 82.144.195.142: icmp_seq=1 ttl=63 time=16 ms
16 bytes from 82.144.195.142: icmp_seq=2 ttl=63 time=16 ms
--- 82.144.195.142 ping statistics ---
3 packets transmitted, 3 packets received, 0% loss
round-trip min/avg/max = 16/19/24 ms
(from pacan4ik1_pacan4ik1)
