As Prashanth has outlined above, "#d" is a route learned as a result of directly connecting two devices that have IP addresses configured on their VLANs
#d 192.168.0.0/24 192.168.0.1 1 U------um--f- v1_vlan 2d:1h:3m:45s#s 192.168.0.0/24 192.168.0.1 1 U------um--f- v1_vlan 2d:1h:3m:45s#o 192.168.0.0/24 192.168.0.1 1 U------um--f- v1_vlan 2d:1h:3m:45s
The above is simply for illustration purposes
Extreme switches work with routes that are:
- Statically added and will be preceded with #s
- Learned through direct routing which is accomplished by directly connecting two devices that have IP addresses configured on their VLANs. These will be preceded with #d
- Dynamically learned through a routing protocol (ospf, rip, etc), these will have their respective descriptor, refer to the origin section of the show iproute section
Origin(Ori): (b) BlackHole, (be) EBGP, (bg) BGP, (bi) IBGP, (bo) BOOTP,
(ct) CBT, (d) Direct, (df) DownIF, (dv) DVMRP, (e1) ISISL1Ext,
(e2) ISISL2Ext, (h) Hardcoded, (i) ICMP, (i1) ISISL1 (i2) ISISL2,
(is) ISIS, (mb) MBGP, (mbe) MBGPExt, (mbi) MBGPInter, (mp) MPLS Lsp,
(mo) MOSPF (o) OSPF, (o1) OSPFExt1, (o2) OSPFExt2,
(oa) OSPFIntra, (oe) OSPFAsExt, (or) OSPFInter, (pd) PIM-DM, (ps) PIM-SM,
(r) RIP, (ra) RtAdvrt, (s) Static, (sv) SLB_VIP, (un) UnKnown,
(*) Preferred unicast route (@) Preferred multicast route,
(#) Preferred unicast and multicast route.
In conclusion, you can only delete routes that you've manually added (i.e. Default routes and Static routes)